CLINICAL INVESTIGATIONS WITH NICOTINE-FREE CIGARETTES ATROTABAC.
D035843:Biomedical Research; D002031:Bulgaria; D008171:Lung Diseases; D009538:Nicotine; D012907:Smoking; D014116:Toxicology
D009538:Nicotine
BULGARIA; CLINICAL RESEARCH; LUNG DISEASES; SMOKING; TOXICOLOGIC REPORT