- Correspondence to Dr Olga Sanchez Pernaute, Rheumatology Division, Fundacion Jimenez Diaz University Hospital, Avda Reyes Catolicos 2; Madrid 28040, Spain;
- Received April 21, 2012
- Revised November 5, 2012
- Accepted November 18, 2012
- First published December 12, 2012.
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