Seasonal distribution of births of boys with anomalies of the urethra.
D006801:Humans; D007021:Hypospadias / Q000453:epidemiology*; D007231:Infant, Newborn; D008297:Male; D012424:Rural Population; D012621:Seasons; D013548:Sweden; D014505:Urban Population; D014521:Urethra / Q000002:abnormalities*