- Correspondence to Professor G F Ferraccioli, Institute of Rheumatology and Affine Sciences, School of Medicine, Catholic University of the Sacred Heart, CIC, Via Moscati 31, Rome I-00168, Italy;
- Received June 22, 2013
- Revised July 27, 2013
- Accepted September 8, 2013
- First published November 4, 2013.
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