- Correspondence to Dr Carrie A Thompson, Division of Hematology, Department of Medicine, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA;
- Received 31 May 2012
- Revision received 15 November 2012
- Accepted 21 January 2013
- Published in print 1 March 2013.
- Published online 8 March 2013.
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