- Correspondence to Dr Georgina L Hold, Institute of Medical Sciences, Aberdeen University, Foresterhill, Aberdeen AB25 2ZD, UK;
- Received 2 May 2014
- Revised 7 May 2014
- Accepted 9 May 2014
- Published in print 1 December 2014.
- Published online 31 October 2014.
- Published first 9 June 2014.
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