High school athletes with the sickle cell trait (Hb A/S).
D000293:Adolescent; D000755:Anemia, Sickle Cell / Q000453:epidemiology; D005538:Football; D006801:Humans; D008297:Male; D012805:Sickle Cell Trait / Q000453:epidemiology; D013178:Sports Medicine; D013714:Tennessee