Sickle-cell trait and altitude.
D000337:Aerospace Medicine; D000531:Altitude; D000755:Anemia, Sickle Cell / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male; D013789:Thalassemia / Q000175:diagnosis
D006454:Hemoglobins