title: Risk in sickle-cell trait.
mesh_terms: D000337:Aerospace Medicine; D000531:Altitude; D000755:Anemia, Sickle Cell / Q000150:complications*; D006579:Heterozygote; D006801:Humans; D000860:Hypoxia / Q000150:complications*; D013159:Splenic Infarction / Q000209:etiology