Varsity football. Knee and ankle injury.
D016512:Ankle Injuries; D001265:Athletic Injuries / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D007718:Knee Injuries / Q000453:epidemiology / Q000517:prevention & control*; D007869:Leg Injuries / Q000453:epidemiology / Q000601:surgery; D008297:Male; D009518:New York; D012494:Sampling Studies