[1] VA Nasonova Res Inst Rheumatol, Moscow, Russia
[2] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[3] Kazan State Med Univ, Kazan, Russia
[4] North Western State Med Univ, St Petersburg, Russia
[5] Clin Rheumatol, Vladivostok, Russia
[6] Novosibirsk State Med Univ, Novosibirsk, Russia
[7] Res Inst Clin & Expt Lymphol, Novosibirsk, Russia
[8] Russian Union Patients, Moscow, Russia
[9] Novartis Pharma LLC, Moscow, Russia
[10] Russian Ankylosing Spondylitis Assoc, Moscow, Russia