- Correspondence to Dr Joseph Cofrancesco Jr, Department of Medicine, Johns Hopkins University School of Medicine, Armstrong Medical Education, Building 1600, McElderry Street, Suite 230, Baltimore, MD 21205, USA;
- Received October 20, 2016
- Revised February 16, 2017
- Accepted March 5, 2017
- First published March 31, 2017.
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