title: In memoriam. Dr. Nigel Gray.
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D009369:Neoplasms / Q000517:prevention & control*; D012907:Smoking / Q000331:legislation & jurisprudence; D000074606:Smoking Prevention; D014028:Tobacco Smoke Pollution / Q000517:prevention & control*; D014944:World Health Organization
chemical_list: D014028:Tobacco Smoke Pollution