- Correspondence to Professor Michael G Sarr, Emeritus J C Masson Professor of Surgery, Department of Surgery, Mayo Clinic, 200 1st St SW, Mayo Clinic (GU 10-01), Rochester, MN 55902, USA;
- Received July 24, 2017
- Revised June 8, 2017
- Accepted July 25, 2017
- First published August 10, 2017.
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