- Correspondence to Dr David A Watkins, Division of General Internal Medicine, University of Washington, 325 9th Ave Box 359780, Seattle, WA 98104, USA;
- Received 15 December 2016
- Revised 31 January 2017
- Accepted 1 February 2017
- Published in print 1 February 2017.
- Published online 22 February 2017.
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