Gaál, J.; Lakos, G.; Szodoray, P.; Kiss, J.; Horváth, I.; Horkay, E.; Nagy, G.; Szegedi, A. Immunological and Clinical Effects of Alphacalcidol in Patients With Psoriatic Arthropathy: Results of an Open, Follow-up Pilot Study. Acta Derm Venereol 2009, 89, 140-144.