- Correspondence to Dr John W Baddley, Department of Medicine/Division of Infectious Diseases, University of Alabama at Birmingham, 1900 University Boulevard, 229 THT, Birmingham, AL 35294-0006, USA;
- Received November 26, 2013
- Revised January 31, 2014
- Accepted February 16, 2014
- First published March 11, 2014.
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