- Correspondence to Dr Christopher Ritchlin, Allergy, Immunology & Rheumatology Division, University of Rochester Medical Center, 601 Elmwood Avenue, Box 695, Rochester, NY 14642, USA;
- Received September 23, 2013
- Revised January 3, 2014
- Accepted January 5, 2014
- First published January 30, 2014.
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