The snowmobile: friend or foe?
D000056:Accident Prevention; D000059:Accidents; D000293:Adolescent; D000328:Adult; D000368:Aged; D001336:Automobiles; D002648:Child; D002675:Child, Preschool; D006259:Craniocerebral Trauma / Q000209:etiology; D005151:Facial Injuries / Q000209:etiology; D006801:Humans; D007869:Leg Injuries / Q000209:etiology; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D013178:Sports Medicine