T.G. SAKOVETS Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012  Sakovets T.G. ― Cand. Med. Sc., Associate Professor of the Department of Neurology and Rehabilitation, tel. +7-909-307-94-77, e-mail: tsakovets@yandex.ru  The prevalence of Sjogren’s disease is estimated at about 0.6%, while 40% of all cases is secondary Sjogren disease in patients with systemic […]