Letter: Carbon monoxide and smoking.
D000397:Air Pollution / Q000032:analysis; D001824:Body Constitution; D002248:Carbon Monoxide / Q000032:analysis*; D003192:Compulsive Behavior; D006801:Humans; D012907:Smoking; D013997:Time Factors; D001335:Vehicle Emissions / Q000032:analysis
D001335:Vehicle Emissions; D002248:Carbon Monoxide