- Correspondence to Dr Thomas H Gallagher, Department of Medicine, University of Washington, 4311-11th Ave NE, Suite 230; Seattle, WA 98015, USA;
- Received 4 February 2013
- Accepted 4 February 2013
- Published in print 1 July 2013.
- Published online 18 June 2013.
- Published first 10 April 2013.
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