title: Letter: Smoking and carboxyhaemoglobin levels.
mesh_terms: D002263:Carboxyhemoglobin / Q000032:analysis; D002986:Clinical Trials as Topic; D004912:Erythrocytes; D005260:Female; D006452:Hemoglobinometry; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D008297:Male; D009538:Nicotine / Q000032:analysis; D012737:Sex Factors; D012907:Smoking
chemical_list: D006454:Hemoglobins; D009538:Nicotine; D002263:Carboxyhemoglobin