Seropositivity combined with smoking is associated with increased prevalence of periodontitis in patients with rheumatoid arthritis. Issue 8 (6th October 2017) - Eriksson, Kaja; Nise, Lena; Alfredsson, Lars; Catrina, Anca Irinel; Askling, Johan; Lundberg, Karin; Klareskog, Lars; Yucel-Lindberg, Tülay