Anna-Karin Abelson, Angélica M. Delgado-Vega, Sergey V. Kozyrev, Elena Sánchez, Rafael Velázquez-Cruz, Niclas Eriksson, Jerome Wojcik, Prasad Linga Reddy, Guadalupe Lima, Sandra D’Alfonso, Sergio Migliaresi, Vicente Baca, Lorena Orozco, Torsten Witte, Norberto Ortego-Centeno, the AADEA group, Hadi Abderrahim, Bernardo A. Pons-Estel, Carmen Gutiérrez, Ana Suárez, Maria Francisca González-Escribano, Javier Martin, Marta E. Alarcón-Riquelme
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Author manuscript; available in PMC 2014 Jan 2.Published in final edited form as: Ann Rheum Dis. 2009 Nov; 68(11): 10.1136/ard.2008.097642. Published online 2008 Nov 19. doi: 10.1136/ard.2008.097642