Incidence of varicocele in normal men and among men of different ages.
D000293:Adolescent; D000328:Adult; D002648:Child; D006801:Humans; D007248:Infertility, Male / Q000209:etiology; D008297:Male; D008875:Middle Aged; D014646:Varicocele / Q000453:epidemiology* / Q000601:surgery