- Correspondence to Georgios D Kitsios, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh Medical Center, NW628 Montefiore Hospital, 3459 Fifth Avenue, Pittsburgh, PA 15213, USA;
- Received May 17, 2017
- Revised July 11, 2017
- Accepted July 17, 2017
- First published August 11, 2017.
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