title: Rebuttal from Meir et al.
mesh_terms: D000531:Altitude; D000818:Animals; D001188:Artiodactyla / Q000502:physiology*; D001717:Birds / Q000502:physiology*; D004625:Embryo, Nonmammalian / Q000098:blood supply*; D004912:Erythrocytes / Q000378:metabolism*; D005260:Female; D005777:Geese / Q000097:blood*; D006454:Hemoglobins / Q000378:metabolism*; D008297:Male; D010100:Oxygen / Q000097:blood*; D010805:Physical Conditioning, Animal / Q000502:physiology*
chemical_list: D006454:Hemoglobins; D010100:Oxygen