Published in Acta Physiol Scand on December 01, 1982
Neuropeptide Y injected in the paraventricular hypothalamus: a powerful stimulant of feeding behavior. Proc Natl Acad Sci U S A (1985) 2.04
Cloning, characterization, and DNA sequence of a human cDNA encoding neuropeptide tyrosine. Proc Natl Acad Sci U S A (1984) 1.49
Rapid accumulation of inositol phosphates in isolated rat superior cervical sympathetic ganglia exposed to V1-vasopressin and muscarinic cholinergic stimuli. Biochem J (1984) 1.49
The lateral hypothalamus as integrator of metabolic and environmental needs: from electrical self-stimulation to opto-genetics. Physiol Behav (2011) 1.47
Neuropeptide Y potentiates the effect of various vasoconstrictor agents on rabbit blood vessels. Br J Pharmacol (1984) 1.46
Deletion of neuropeptide Y (NPY) 2 receptor in mice results in blockage of NPY-induced angiogenesis and delayed wound healing. Proc Natl Acad Sci U S A (2003) 1.28
Presynaptic action of neuropeptide Y in area CA1 of the rat hippocampal slice. J Physiol (1987) 1.27
Thirteenth Gaddum Memorial Lecture. Neuronal and endothelium-derived mediators in the modulation of the gastric microcirculation: integrity in the balance. Br J Pharmacol (1993) 1.14
Effects of stimulating the sympathetic innervation in bursts on submandibular vascular and secretory function in cats. J Physiol (1987) 1.07
Heterogeneity of the intrahepatic biliary epithelium. World J Gastroenterol (2006) 1.07
Molecular structure of mammalian neuropeptide Y: analysis by molecular cloning and computer-aided comparison with crystal structure of avian homologue. Proc Natl Acad Sci U S A (1987) 1.04
Neuropeptide K potently stimulates salivary gland secretion and potentiates substance P-induced salivation. Proc Natl Acad Sci U S A (1989) 1.02
Neuropeptide Y inhibits cholinergic transmission in the isolated guinea pig colon: mediation through alpha-adrenergic receptors. Proc Natl Acad Sci U S A (1987) 1.02
Characterization of vascular neuropeptide Y receptors. Br J Pharmacol (1992) 1.00
Neuropeptide tyrosine (NPY): a newly discovered peptide is present in the mammalian respiratory tract. Thorax (1984) 1.00
Endothelin- and neuropeptide Y-induced vasoconstriction of human epicardial coronary arteries in vitro. Br J Pharmacol (1989) 0.99
Prejunctional modulatory action of neuropeptide Y on peripheral terminals of capsaicin-sensitive sensory nerves. Br J Pharmacol (1989) 0.98
Neuropeptide Y-like immunoreactivity in rat cranial parasympathetic neurons: coexistence with vasoactive intestinal peptide and choline acetyltransferase. Proc Natl Acad Sci U S A (1987) 0.97
Neuronal and non-neuronal modulation of sympathetic neurovascular transmission. Acta Physiol (Oxf) (2011) 0.97
Dorsomedial hypothalamic NPY and energy balance control. Neuropeptides (2012) 0.95
Role of substance P in inflammatory arthritis. Ann Rheum Dis (1992) 0.95
Immunohistochemical localisation of regulatory neuropeptides in human circumvallate papillae. J Anat (1998) 0.94
Purification and characterization of human neuropeptide Y from adrenal-medullary phaeochromocytoma tissue. Biochem J (1984) 0.94
Modulation of cholinergic neurotransmission in guinea-pig trachea by neuropeptide Y. Br J Pharmacol (1988) 0.93
Insulin-like growth factor I shifts from promoting cell division to potentiating maturation during neuronal differentiation. Proc Natl Acad Sci U S A (1991) 0.93
Characterization of neuropeptide Y (NPY) receptors in human cerebral arteries with selective agonists and the new Y1 antagonist BIBP 3226. Br J Pharmacol (1995) 0.93
Nervous and Neuroendocrine regulation of the pathophysiology of cholestasis and of biliary carcinogenesis. World J Gastroenterol (2006) 0.91
Effects of various neuropeptide Y/peptide YY fragments on electrically-evoked contractions of the rat vas deferens. Br J Pharmacol (1990) 0.91
Neuropeptide-Y. A peptide found in human coronary arteries constricts primarily small coronary arteries to produce myocardial ischemia in dogs. J Clin Invest (1989) 0.91
Dependence of non-adrenergic inhibition of cardiac vagal action on peak frequency of sympathetic stimulation in the dog. J Physiol (1988) 0.91
Inhibition of sympathetic vasoconstriction in pigs in vivo by the neuropeptide Y-Y1 receptor antagonist BIBP 3226. Br J Pharmacol (1995) 0.91
Autonomic neuromuscular junctions: current developments and future directions. J Anat (1986) 0.91
Neuropeptides of the autonomic nervous system in Sjögren's syndrome. Ann Rheum Dis (1997) 0.91
Vanilloid receptors mediate adrenergic nerve- and CGRP-containing nerve-dependent vasodilation induced by nicotine in rat mesenteric resistance arteries. Br J Pharmacol (2004) 0.90
Neuropeptide Y, peptide YY and C-terminal fragments release histamine from rat peritoneal mast cells. Br J Pharmacol (1991) 0.89
Autonomic nervous control of nasal vasculature and airflow resistance in the anaesthetized dog. J Physiol (1989) 0.88
Modulation by neuropeptide Y of parasympathetic nerve-evoked nasal vasodilatation via Y2 prejunctional receptor. Br J Pharmacol (1994) 0.88
Vascular pharmacology of BIIE0246, the first selective non-peptide neuropeptide Y Y(2) receptor antagonist, in vivo. Br J Pharmacol (2001) 0.88
Detection of neuropeptide Y and its mRNA in megakaryocytes: enhanced levels in certain autoimmune mice. Proc Natl Acad Sci U S A (1987) 0.88
Occurrence, distribution and origin of peptide-containing nerves of guinea-pig and rat male genitalia and the effects of denervation on sperm characteristics. J Anat (1986) 0.88
Accumulation of inositol phosphates in sympathetic ganglia. Effects of depolarization and of amine and peptide neurotransmitters. Biochem J (1985) 0.87
Neuropeptide Y bioavailability is suppressed in the hindlimb of female Sprague-Dawley rats. J Physiol (2005) 0.87
Potentiation by neuropeptide Y of vasoconstriction in rat resistance arteries. Br J Pharmacol (1988) 0.86
Action of Neurotransmitter: A Key to Unlock the AgRP Neuron Feeding Circuit. Front Neurosci (2013) 0.85
Control of cholangiocyte adaptive responses by visceral hormones and neuropeptides. Clin Rev Allergy Immunol (2009) 0.85
Intramural distribution of regulatory peptides in the sigmoid-recto-anal region of the human gut. Gut (1988) 0.84
Effect of neuropeptide Y on adrenergic and non-adrenergic, non-cholinergic responses in the rat anococcygeus muscle. Br J Pharmacol (1992) 0.84
Comparison of the effects of neuropeptide Y and noradrenaline on rat gastric mucosal blood flow and integrity. Br J Pharmacol (1991) 0.84
Enhancement by neuropeptide Y (NPY) of the dihydropyridine-sensitive component of the response to alpha 1-adrenoceptor stimulation in rat isolated mesenteric arterioles. Br J Pharmacol (1990) 0.84
Evidence for co-transmitter role of neuropeptide Y in the pig spleen. Br J Pharmacol (1989) 0.84
Postjunctional inhibition of contractor responses in the mouse vas deferens by rat and human calcitonin gene-related peptides (CGRP). Br J Pharmacol (1986) 0.83
Sympathetic and parasympathetic interaction in vascular control of the nasal mucosa in anaesthetized cats. J Physiol (1994) 0.83
Alpha3beta4-nicotinic receptors mediate adrenergic nerve- and peptidergic (CGRP) nerve-dependent vasodilation induced by nicotine in rat mesenteric arteries. Br J Pharmacol (2007) 0.83
Early postnatal exposure of mice to side-steam tobacco smoke increases neuropeptide Y in lung. Am J Physiol Lung Cell Mol Physiol (2011) 0.82
The ability of neuropeptide Y to mediate responses in the murine cutaneous microvasculature: an analysis of the contribution of Y1 and Y2 receptors. Br J Pharmacol (2003) 0.82
Investigations into neuropeptide Y-mediated presynaptic inhibition in cultured hippocampal neurones of the rat. Br J Pharmacol (1992) 0.81
Endothelium removal augments endothelium-independent vasodilatation in rat mesenteric vascular bed. Br J Pharmacol (2008) 0.81
Neuropeptides in intact and denervated tympanic membranes. An immunohistofluorescence study in the rat. Arch Otorhinolaryngol (1989) 0.81
Ruthenium-red inhibits CGRP release by capsaicin and resiniferatoxin but not by ouabain, bradykinin or nicotine in guinea-pig heart: correlation with effects on cardiac contractility. Br J Pharmacol (1991) 0.81
Limited neuropeptide Y precursor processing in unfavourable metastatic neuroblastoma tumours. Br J Cancer (2000) 0.81
Human gallbladder carcinoma: Role of neurotrophins, MIB-1, CD34 and CA15-3. Eur J Histochem (2010) 0.81
Neuropeptide Y and reserpine-resistant vasoconstriction evoked by sympathetic nerve stimulation in the dog skeletal muscle. Br J Pharmacol (1988) 0.80
Intranasal administration of neuropeptide Y in man: systemic absorption and functional effects. Br J Pharmacol (1996) 0.80
Proliferative enteropathy (PE)-induced changes in the calbindin-immunoreactive (CB-IR) neurons of inferior mesenteric ganglion supplying the descending colon in the pig. J Mol Neurosci (2011) 0.80
Novel expression pattern of neuropeptide Y immunoreactivity in the peripheral nervous system in a rat model of neuropathic pain. Mol Pain (2015) 0.79
Vasoconstrictor effects of various neuropeptide Y analogues on the rat tail artery in the presence of phenylephrine. Br J Pharmacol (1993) 0.79
Interactions between developing nerves and salivary glands. Organogenesis (2013) 0.79
Neuropeptide Y and neurovascular control in skeletal muscle and skin. Am J Physiol Regul Integr Comp Physiol (2009) 0.79
Overexpression of neuropeptide Y in the dorsomedial hypothalamus increases trial initiation but does not significantly alter concentration-dependent licking to sucrose in a brief-access taste test. Physiol Behav (2013) 0.79
Innervation of the cavernous body of the human efferent tear ducts and function in tear outflow mechanism. J Anat (2000) 0.78
Neuropeptide Y modulates ATP-induced increases in internal calcium via the adenylate cyclase/protein kinase A system in a human neuroblastoma cell line. Biochem J (1997) 0.78
Immunohistochemical demonstration of choline acetyltransferase-immunoreactive preganglionic nerve fibers in guinea pig autonomic ganglia. Proc Natl Acad Sci U S A (1986) 0.78
Neuropeptide Y Stimulates Proliferation and Migration of Vascular Smooth Muscle Cells from Pregnancy Hypertensive Rats via Y1 and Y5 Receptors. PLoS One (2015) 0.78
Levels of neuropeptide Y in synovial fluid relate to pain in patients with knee osteoarthritis. BMC Musculoskelet Disord (2014) 0.77
Influence of TASP-V, a novel neuropeptide Y (NPY) Y2 agonist, on nasal and bronchial responses evoked by histamine in anaesthetized pigs and in humans. Br J Pharmacol (1999) 0.77
Neuropeptide Y (NPY) metabolism by endopeptidase-2 hinders characterization of NPY receptors in rat kidney. Br J Pharmacol (1991) 0.77
Calcitonin gene-related peptide and human epicardial coronary arteries: presence, release and vasodilator effects. Br J Pharmacol (1991) 0.77
Phenotypic alterations of neuropeptide Y and calcitonin gene-related peptide-containing neurons innervating the rat temporomandibular joint during carrageenan-induced arthritis. Eur J Histochem (2012) 0.77
Allergic rhinoconjunctivitis: the role of histamine. Mediators Inflamm (1994) 0.77
The effects of neuropeptide Y on myocardial contractility and coronary blood flow. Br J Pharmacol (1991) 0.77
Decreased hepatic nerve fiber innervation in patients with liver cirrhosis. Gut Liver (2007) 0.77
Influence of estradiol supplementation on neuropeptide Y neurotransmission in skeletal muscle arterioles of F344 rats. Am J Physiol Regul Integr Comp Physiol (2012) 0.76
Specific patterns of immunoreactivity in neuronal elements of the anterior major pelvic ganglion of the male guinea-pig. J Anat (1991) 0.76
Cardiac neuropeptide Y and noradrenaline balance in patients with congestive heart failure. Br Heart J (1994) 0.76
A comparison of the effects of 6-hydroxydopamine and reserpine on noradrenergic and peptidergic nerves in rat brown adipose tissue. J Anat (1989) 0.76
Neuropeptide Y changes the excitability of fine afferent units in the rat knee joint. Br J Pharmacol (2001) 0.75
Distribution and coexistence of neuropeptides in nerve fibres in the temporomandibular joint of late gestation fetal sheep. J Anat (1997) 0.75
Sympathetic innervation of human muscle spindles. J Anat (2015) 0.75
Peptidergic innervation of the internal anal sphincter in Hirschsprung's disease. Pediatr Surg Int (2013) 0.75
Dual effect of nicotine on cardiac noradrenaline release during metabolic blockade. Basic Res Cardiol (1995) 0.75
Neuropeptide Y Gene Promoter -399T/C Polymorphism Increases Risk of Ischemic Stroke. Balkan Med J (2013) 0.75
Visceral motor neuron diversity delineates a cellular basis for nipple- and pilo-erection muscle control. Nat Neurosci (2016) 0.75
Alpha-adrenoceptor modulation of the efferent function of capsaicin-sensitive sensory neurones in guinea-pig isolated atria. Br J Pharmacol (1992) 0.75
Neuropeptide Y in the adult and fetal human pineal gland. Biomed Res Int (2014) 0.75
Modulatory effect of neuropeptide Y on acetylcholine-induced oedema and vasoconstriction in isolated perfused lungs of rabbit. Br J Pharmacol (1994) 0.75
Prejunctional modulatory action of neuropeptide Y on responses due to antidromic activation of peripheral terminals of capsaicin-sensitive sensory nerves in the isolated guinea-pig ileum. Br J Pharmacol (1991) 0.75
Ultrastructural Correlates of Enhanced Norepinephrine and Neuropeptide Y Cotransmission in the Spontaneously Hypertensive Rat Brain. ASN Neuro (2015) 0.75
Rapid decrease in neuropeptide Y gene expression in rat adrenal gland induced by the alpha 2-adrenoceptor agonist, clonidine. Br J Pharmacol (1991) 0.75
Age Impaired endothelium-dependent vasodilation is improved by resveratrol in rat mesenteric arteries. J Exerc Nutrition Biochem (2016) 0.75
The Role of Neuropeptide Y mRNA Expression Level in Distinguishing Different Types of Depression. Front Aging Neurosci (2016) 0.75
Design, synthesis, and evaluation of Phe-Gly mimetics: heterocyclic building blocks for pseudopeptides. J Med Chem (1999) 9.39
Amplified DNA with limited homology to myc cellular oncogene is shared by human neuroblastoma cell lines and a neuroblastoma tumour. Nature (1983) 8.18
The National Depressive and Manic-Depressive Association consensus statement on the undertreatment of depression. JAMA (1997) 6.32
Ankle-arm index as a marker of atherosclerosis in the Cardiovascular Health Study. Cardiovascular Heart Study (CHS) Collaborative Research Group. Circulation (1993) 4.75
Polypeptide with broad biological activity: isolation from small intestine. Science (1970) 4.14
Tetracyclines inhibit microglial activation and are neuroprotective in global brain ischemia. Proc Natl Acad Sci U S A (1998) 4.14
Neuropeptide Y--a novel brain peptide with structural similarities to peptide YY and pancreatic polypeptide. Nature (1982) 4.06
Effect of ergot drugs on central catecholamine neurons: evidence for a stimulation of central dopamine neurons. J Pharm Pharmacol (1973) 3.54
Second brain death examination may negatively affect organ donation. Neurology (2010) 3.48
Quantitative trait loci on chromosomes 3 and 17 influence phenotypes of the metabolic syndrome. Proc Natl Acad Sci U S A (2000) 3.44
Peptidergic neurones. Nature (1980) 3.36
Sociometric risk networks and risk for HIV infection. Am J Public Health (1997) 3.29
Increased amount of nitric oxide in exhaled air of asthmatics. Eur Respir J (1993) 3.29
Human mucosal addressin cell adhesion molecule-1 is preferentially expressed in intestinal tract and associated lymphoid tissue. Am J Pathol (1997) 3.24
Increased cerebrospinal fluid levels of endorphins after electro-acupuncture. Acta Physiol Scand (1977) 3.15
Galanin - a novel biologically active peptide from porcine intestine. FEBS Lett (1983) 3.12
Potent and nontoxic antisense oligonucleotides containing locked nucleic acids. Proc Natl Acad Sci U S A (2000) 3.04
Greatly increased luminal nitric oxide in ulcerative colitis. Lancet (1994) 2.96
Arrest of beta-amyloid fibril formation by a pentapeptide ligand. J Biol Chem (1996) 2.93
The neuropeptide Y/agouti gene-related protein (AGRP) brain circuitry in normal, anorectic, and monosodium glutamate-treated mice. Proc Natl Acad Sci U S A (1998) 2.91
Neuropeptide Y: complete amino acid sequence of the brain peptide. Proc Natl Acad Sci U S A (1982) 2.89
Structure of porcine cholecystokinin-pancreozymin. 1. Cleavage with thrombin and with trypsin. Eur J Biochem (1968) 2.72
Experimental immunohistochemical studies on the localization and distribution of substance P in cat primary sensory neurons. Brain Res (1975) 2.72
A substance P antagonist inhibits vagally induced increase in vascular permeability and bronchial smooth muscle contraction in the guinea pig. Proc Natl Acad Sci U S A (1983) 2.64
Effect of antidepressant drugs on the depletion of intraneuronal brain 5-hydroxytryptamine stores caused by 4-methyl-alpha-ethyl-meta-tyramine. Eur J Pharmacol (1969) 2.61
Antibacterial peptides from pig intestine: isolation of a mammalian cecropin. Proc Natl Acad Sci U S A (1989) 2.59
Isolation from porcine-intestinal wall of a vasoactive octacosapeptide related to secretin and to glucagon. Eur J Biochem (1972) 2.59
Capsaicin-induced desensitization of airway mucosa to cigarette smoke, mechanical and chemical irritants. Nature (1983) 2.57
Immunohistochemical studies using antibodies to leucine-enkephalin: initial observations on the nervous system of the rat. Neuroscience (1976) 2.56
Intragastric nitric oxide production in humans: measurements in expelled air. Gut (1994) 2.53
Structure of porcine secretin. The amino acid sequence. Eur J Biochem (1970) 2.44
Substance p: localization in the central nervous system and in some primary sensory neurons. Science (1975) 2.33
Platelet transfusion for patients with cancer: clinical practice guidelines of the American Society of Clinical Oncology. J Clin Oncol (2001) 2.33
Reduced immunostaining for the extracellular Ca2+-sensing receptor in primary and uremic secondary hyperparathyroidism. J Clin Endocrinol Metab (1996) 2.33
Isolation of two novel candidate hormones using a chemical method for finding naturally occurring polypeptides. Nature (1980) 2.31
Effects of some antidepressant drugs on the depletion of intraneuronal brain catecholamine stores caused by 4,alpha-dimethyl-meta-tyramine. Eur J Pharmacol (1969) 2.26
The no-scalpel vasectomy. J Urol (1991) 2.24
Pancreatic polypeptide family (APP, BPP, NPY and PYY) in relation to sympathetic vasoconstriction resistant to alpha-adrenoceptor blockade. Acta Physiol Scand (1982) 2.23
Symptoms of depression and survival experience among three samples of smokers trying to quit. Psychol Addict Behav (2001) 2.20
Characterization of a gastrin releasing peptide from porcine non-antral gastric tissue. Biochem Biophys Res Commun (1979) 2.16
Sensitive mRNA detection using unfixed tissue: combined radioactive and non-radioactive in situ hybridization histochemistry. Histochemistry (1992) 2.15
Molecular cloning of a brain-specific calcium/calmodulin-dependent protein kinase. Proc Natl Acad Sci U S A (1987) 2.13
A molecular model of Alzheimer amyloid beta-peptide fibril formation. J Biol Chem (1999) 2.12
Hyperhomocystinemia in patients with nonarteritic anterior ischemic optic neuropathy, central retinal artery occlusion, and central retinal vein occlusion. Ophthalmology (2000) 2.12
Morphometric and electron-microscopic analyses of the effects of gonadotropin-releasing hormone agonists on uterine leiomyomas. Arch Pathol Lab Med (1998) 2.11
Smoking withdrawal dynamics in unaided quitters. J Abnorm Psychol (2000) 2.11
Immunohistochemical analysis of peptide pathways possibly related to pain and analgesia: enkephalin and substance P. Proc Natl Acad Sci U S A (1977) 2.11
Neuropeptide Y distribution in the rat brain. Science (1983) 2.10
Pancreastatin, a novel pancreatic peptide that inhibits insulin secretion. Nature (1987) 2.09
Evidence for dopamine receptor stimulation by apomorphine. J Pharm Pharmacol (1967) 2.08
Meta-analysis of 32 genome-wide linkage studies of schizophrenia. Mol Psychiatry (2008) 2.07
Substance P-immunoreactive sensory nerves in the lower respiratory tract of various mammals including man. Cell Tissue Res (1984) 2.05
N-terminally extended somatostatin: the primary structure of somatostatin-28. FEBS Lett (1980) 2.04
Isolation and characterization of peptide YY (PYY), a candidate gut hormone that inhibits pancreatic exocrine secretion. Proc Natl Acad Sci U S A (1982) 2.03
Stereospecific interaction between narcotic analgesics and a synaptic plasm a membrane fraction of rat cerebral cortex. Acta Pharmacol Toxicol (Copenh) (1973) 2.03
Closely related plasmids from Staphylococcus aureus and soil bacilli. Plasmid (1982) 2.02
Enkephalin-like immunoreactivity in gland cells and nerve terminals of the adrenal medulla. Neuroscience (1978) 2.01
A randomized, placebo-controlled trial of antimicrobial treatment for children with clinically diagnosed acute sinusitis. Pediatrics (2001) 2.00
A multisite field test of the acceptability of physical activity counseling in primary care: project PACE. Am J Prev Med (1996) 2.00
Vasoactive intestinal polypeptide in cholinergic neurons of exocrine glands: functional significance of coexisting transmitters for vasodilation and secretion. Proc Natl Acad Sci U S A (1980) 2.00
Distribution of substance P-like immunoreactivity in the central nervous system of the rat--I. Cell bodies and nerve terminals. Neuroscience (1978) 1.99
Evans blue fluorescence: quantitative and morphological evaluation of vascular permeability in animal tissues. J Neurosci Methods (1983) 1.98
Co-existence of substance P and calcitonin gene-related peptide-like immunoreactivities in sensory nerves in relation to cardiovascular and bronchoconstrictor effects of capsaicin. Eur J Pharmacol (1985) 1.97
Amino acid sequence of PR-39. Isolation from pig intestine of a new member of the family of proline-arginine-rich antibacterial peptides. Eur J Biochem (1991) 1.95
Localization of peptide YY (PYY) in gastrointestinal endocrine cells and effects on intestinal blood flow and motility. Proc Natl Acad Sci U S A (1982) 1.95
Clinical and diagnostic features of tuberculous arthritis. Am J Med (1972) 1.93
Immunohistochemical evidence for separate populations of somatostatin-containing and substance P-containing primary afferent neurons in the rat. Neuroscience (1976) 1.92
Neurochemical basis of acupuncture analgesia. Annu Rev Pharmacol Toxicol (1982) 1.91
High nitric oxide production in human paranasal sinuses. Nat Med (1995) 1.90
Hypocretin/orexin- and melanin-concentrating hormone-expressing cells form distinct populations in the rodent lateral hypothalamus: relationship to the neuropeptide Y and agouti gene-related protein systems. J Comp Neurol (1998) 1.87
Vascular protein linkage in various tissue induced by substance P, capsaicin, bradykinin, serotonin, histamine and by antigen challenge. Naunyn Schmiedebergs Arch Pharmacol (1983) 1.85
Release of multiple tachykinins from capsaicin-sensitive sensory nerves in the lung by bradykinin, histamine, dimethylphenyl piperazinium, and vagal nerve stimulation. Am Rev Respir Dis (1988) 1.84
Use of a biothesiometer to measure individual vibration thresholds and their variation in 519 non-diabetic subjects. Br Med J (Clin Res Ed) (1984) 1.83
Climate change and the integrity of science. Science (2010) 1.80
Loss of fertility in men with varicocele. Fertil Steril (1993) 1.80