title: A simple and convenient method for sampling carbon-14 in the expired breath.
mesh_terms: D000388:Air / Q000032:analysis*; D001647:Bile Acids and Salts / Q000378:metabolism; D002245:Carbon Dioxide / Q000032:analysis; D002250:Carbon Radioisotopes / Q000032:analysis*; D004041:Dietary Fats / Q000378:metabolism; D007408:Intestinal Absorption; D007785:Lactose / Q000378:metabolism; D008722:Methods; D012119:Respiration
chemical_list: D001647:Bile Acids and Salts; D002250:Carbon Radioisotopes; D004041:Dietary Fats; D002245:Carbon Dioxide; D007785:Lactose