vol. 26 no. 143
- Received September 13, 2016.
- Accepted October 23, 2016.
- Published online January 31, 2017.
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- 1Dept of Medicine, Division of Pulmonary and Critical Care Medicine, University of Washington, Seattle, WA, USA
- 2Medical Service, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
- 3Dept of Internal Medicine, University Clinic Heidelberg, Heidelberg, Germany
- Andrew M. Luks, Division of Pulmonary and Critical Care Medicine, Harborview Medical Center, 325 Ninth Avenue, Box 359762, Seattle, WA 98104, USA. E-mail: