Funding for this research was provided by:
National Cancer Institute (R01CA166785)
Centers for Disease Control and Prevention (5U48DP000049)
Received: 24 September 2017
Accepted: 25 September 2017
First Online: 2 October 2017
: The author is Professor Emeritus of Community Health and Preventive Medicine at Morehouse School of Medicine, Atlanta GA, USA, and Extraordinary Professor of Community Health at Stellenbosch University, Cape Town, South Africa. He is Immediate Past President of the American College of Preventive Medicine.
: Not applicable: this commentary is not a research report and no human subjects are involved.
: Not applicable: this manuscript includes no data on any individual person.
: The author declare that there are no competing interests.
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