EULAR Sjögren's syndrome disease activity index (ESSDAI): a user guide
Raphaèle Seror, Simon J Bowman, Pilar Brito-Zeron, Elke Theander, Hendrika Bootsma, Athanasios Tzioufas, Jacques-Eric Gottenberg, Manel Ramos-Casals, Thomas Dörner, Philippe Ravaud, Claudio Vitali, Xavier Mariette,
RMD Open Feb 2015, 1 (1) e000022; DOI: 10.1136/rmdopen-2014-000022