About the Authors
Mayo Clinic, Rochester, Minnesota, United States of America
Centre on Global Change and Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
Center for Tobacco Control Research and Education, University of California San Francisco, San Francisco, California, United States of America
The authors have declared that no competing interests exist.
MEM conducted the research and developed the manuscript. KL, JOE, and RDH assisted in research and writing of the manuscript. QG assisted in translating documents and writing of the manuscript.