- Correspondence to Dr Heather A Pines, Division of Global Public Health, Department of Medicine, University of California, San Diego, 9500 Gilman Dr., MC 0507, La Jolla, CA 92093-0507, USA;
- Received May 14, 2014
- Revised August 28, 2014
- Accepted September 21, 2014
- First published October 8, 2014.
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