title: High altitude, haematocrit and age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000531:Altitude; D002648:Child; D002675:Child, Preschool; D006400:Hematocrit; D006801:Humans; D008297:Male; D008875:Middle Aged; D010568:Peru