- Correspondence to Dr Edward Keystone, The Rebecca MacDonald Centre for Arthritis & Autoimmune Diseases, Mount Sinai Hospital, 60 Murray St., Room 2-006, Box 4, Toronto, ON, Canada M5T 3L9;
- Received March 27, 2013
- Revised July 5, 2013
- Accepted July 15, 2013
- First published August 5, 2013.
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