- Correspondence to Dr Dominic A Sisti, Department of Medical Ethics & Health Policy, Perelman School of Medicine at the University of Pennsylvania, 3401 Market Street, Suite 320, Philadelphia, PA 19104, USA;
- Received March 10, 2014
- Revised September 11, 2014
- Accepted October 3, 2014
- First published October 23, 2014.
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