[1] Hosp Univ Marques De Valdecilla, IDIVAL, ES-39008 Santander, Spain
[2] Hosp Gen Univ Valencia, Valencia, Spain
[3] Hosp Valme, Seville, Spain
[4] Hosp Clin Barcelona, Barcelona, Spain
[5] Hosp Peset Valencia, Valencia, Spain
[6] Hosp Gen Valle Hebron, Barcelona, Spain
[7] Hosp Leon, Div Ophthalmol, Valencia, Spain
[8] Hosp Univ Fe, Valencia, Spain
[9] Hosp San Cecilio, Granada, Spain
[10] Univ Hosp, IOBA, Valladolid, Spain
[11] Hosp Cruces, Bilbao, Spain
[12] Hosp Toledo, Toledo, Spain
[13] Hosp Donosti San Sebastian, Bilbao, Spain
[14] Hosp Basurto, Bilbao, Spain
[15] Hosp Univ Mostoles, Madrid, Spain
[16] Hosp Gen Alicante, Madrid, Spain
[17] Hosp Univ La Paz Madrid, Madrid, Spain
[18] Hosp Clin San Carlos, Madrid, Spain
[19] Hosp Pontevedra, Torrelavega, Spain
[20] Hosp Sierrallana, Torrelavega, Spain
[21] Hosp Princesa, Madrid, Spain
[22] Hosp Cordoba, La Coruna, Spain
[23] Hosp Univ Salamanca, La Coruna, Spain
[24] HUCA Coruna, La Coruna, Spain
[25] Hosp Doctor Negrin Canarias, La Coruna, Spain
[26] Hosp Univ Santiago Compostela, La Coruna, Spain
[27] Hosp Cabuenes, Gijon, Spain
[28] Hosp Lucus Augusti, Lugo, Spain
[29] Hosp San Pedro Alcantara, Caceres, Spain
[30] Hosp Arrixaca, Murcia, Spain
[31] Fdn Jimenez Diaz, Madrid, Spain
[32] Hosp 12 Octubre, E-28041 Madrid, Spain
[33] Hosp Univ Fdn Alcorcon, Badalona, Spain
[34] Hosp Clin Zaragoza, Badalona, Spain
[35] Hosp Merida, Badalona, Spain
[36] Hosp Univ Germans Trias Pujol, Badalona, Spain
[37] Hosp Ferrol, La Coruna, Spain
[38] Rheumatol Hosp Miguel Servet, Zaragoza, Spain
[39] Rheumatol Hosp Univ Infanta Sofia, Madrid, Spain