- Correspondence to Dr Carl McQueen, Academic Department of Anaesthesia, Critical Care, Pain & Resuscitation, 1st Floor MIDRU Building, Birmingham Heartlands Hospital, Bordesley Green East, Birmingham, West Midlands B9 5SS, UK;
- Received May 27, 2013
- Revised September 10, 2013
- Accepted September 11, 2013
- First published October 16, 2013.
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