- Correspondence to Dr Alan Wertheimer, Department of Bioethics, Clinical Center, National Institutes of Health, Building 10, Room 1C118, Bethesda, MD 20892-1156, USA;
- Received April 10, 2013
- Revised April 26, 2013
- Accepted April 29, 2013
- First published May 23, 2013.
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