Regional Difference in Disease Burden Among Patients with Psoriatic Arthritis: A Multi-Center Study - KILIÇ, ERKAN; KILIÇ, GAMZE; NAS, KEMAL; sargın, betül; acer kasman, sevtap; ALKAN, HAKAN; ŞAHİN, NİLAY; cengiz, gizem; CÜZDAN COŞKUN, NİHAN; ALBAYRAK GEZER, İLKNUR; KESKİN, ESRA DİLEK; mülkoğlu, cevriye; et al. (My University, 2019)