Validation of EULAR primary Sjögren's syndrome disease activity (ESSDAI) and patient indexes (ESSPRI)
Raphaèle Seror, Elke Theander, Johan G Brun, Manel Ramos-Casals, Valeria Valim, Thomas Dörner, Hendrika Bootsma, Athanasios Tzioufas, Roser Solans-Laqué, Thomas Mandl, Jacques-Eric Gottenberg, Eric Hachulla, Kathy L Sivils, Wan-Fai Ng, Anne-Laure Fauchais, Stefano Bombardieri, Guido Valesini, Elena Bartoloni, Alain Saraux, Matija Tomsic, Takayuki Sumida, Susumu Nishiyama, Roberto Caporali, Aike A Kruize, Cristina Vollenweider, Philippe Ravaud, Claudio Vitali, Xavier Mariette, Simon J Bowman,
Annals of the Rheumatic Diseases May 2015, 74 (5) 859-866; DOI: 10.1136/annrheumdis-2013-204615