Smokers' polycythaemia.
D002248:Carbon Monoxide / Q000097:blood; D002263:Carboxyhemoglobin / Q000378:metabolism; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D011086:Polycythemia / Q000097:blood / Q000209:etiology*; D012907:Smoking
D006454:Hemoglobins; D002248:Carbon Monoxide; D002263:Carboxyhemoglobin