Fatma Gül YURDAKUL, Filiz ESER, Hatice BODUR, Ülker GÜL, Müzeyyen GÖNÜL, and Işıl Deniz OĞUZ, “Disease Activity and Related Variables in Patients with Psoriatic Arthritis”, Archives of Rheumatology, vol. 29, no. 1, pp. 008–013, Jan. 2014.