Hazards of long distance cycling.
D001265:Athletic Injuries / Q000209:etiology*; D001642:Bicycling; D003560:Cysts / Q000209:etiology; D005837:Genitalia, Male / Q000293:injuries; D006801:Humans; D008297:Male; D008875:Middle Aged; D010502:Perineum; D013177:Sports