- Correspondence to Dr David T Levy, Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, 3300 Whitehaven St, NW, Suite 4100, Washington, DC 20007, USA;
- Received March 19, 2017
- Revised July 11, 2017
- Accepted August 5, 2017
- First published October 2, 2017.
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