- Correspondence to Dr Maurizio Cereda, Department of Anesthesiology and Critical Care, Perelman School of Medicine at the University of Pennsylvania, Dulles 773, 3400 Spruce Street, Philadelphia, PA 19104-4283, USA;
- Received December 7, 2016
- Revised April 13, 2017
- Accepted May 1, 2017
- First published June 20, 2017.
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