- Correspondence to Dr Jane R Schwebke, Division of Infectious Diseases, Department of Medicine, University of Alabama at Birmingham, 703 19th St. South, ZRB 239, Birmingham, AL 35294-0007, USA;
- Received October 29, 2012
- Revised January 28, 2013
- Accepted January 31, 2013
- First published March 30, 2013.
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