A study of bicycle accidents.
D000007:Abdominal Injuries / Q000453:epidemiology; D000063:Accidents, Traffic; D000293:Adolescent; D000328:Adult; D000368:Aged; D001642:Bicycling; D002648:Child; D002675:Child, Preschool; D006259:Craniocerebral Trauma / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D012621:Seasons; D013177:Sports; D013898:Thoracic Injuries / Q000453:epidemiology; D013997:Time Factors; D014947:Wounds and Injuries / Q000453:epidemiology* / Q000209:etiology