Background Recently, the US Institute of Medicine has proposed that raising the minimum age for tobacco purchasing/sales to 21 years would likely lead to reductions in smoking behavior among young ...

1 Clinical Trials Research Unit, School of Population Health, The University of Auckland, Auckland, New Zealand 2 Social & Community Health, School of Population Health, The University of Auckland 3 ...

1 Department of Health Behavior, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA 2 Department of Medicine, Stanford ...

Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA Correspondence to Dr Kelvin Choi, Division of Epidemiology and Community Health, University of ...