- Correspondence to Dr C Craig Blackmore, Center for Health Services Research, Virginia Mason Medical Center, Mailstop: R3–324, 1202 Terry Avenue, Room 324, Seattle, WA 98101, USA;
- Received May 28, 2014
- Revised July 3, 2014
- Accepted July 7, 2014
- First published July 23, 2014.
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