- Correspondence to Dr James H Willig, Department of Medicine, Division of Infectious Diseases, University of Alabama School of Medicine (UAB), BBRB 220B, 1530 3rd Ave S, Birmingham, AL 35294-2050, USA;
- Received November 18, 2013
- Revised August 25, 2014
- Accepted September 29, 2014
- First published October 28, 2014.
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