- Correspondence to Professor Chyke A Doubeni, Department of Family Medicine and Community Health, Perelman School of Medicine, University of Pennsylvania, Gates 2, 3400 Spruce Street, Philadelphia PA 19104, USA;
- Received July 24, 2016
- Revised September 20, 2016
- Accepted September 25, 2016
- First published October 12, 2016.
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