The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General, 2014Us Department of Health and Human ServicesAtlanta, GA: Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health, 20141081 pp. Online (grey literature): http://www.surgeongeneral.gov/library/reports/50‐years‐of‐progress/