“…Prospective large studies have been published for etanercept (Paller et al, ), ustekinumab (Landells et al, ), adalumimab (Papp et al, ), and methotrexate (Di Lernia et al, ; Papp et al, ). Other information come from case series, retrospective studies, or systematic review of the literature (Bronckers et al, in press; Bulbul Baskan, Yazici, Tunali, and Saricaoglu, ; Charbit et al, ; De Jager, de Jong, van de Kerkhof, and Seyger, ; Di Lernia et al, ; Kaur, Dogra, De, and Kanwar, ; Van Geel, Mul, et al, ; Van Geel, Oostveen, et al, ). Because few drugs have been evaluated in prospective studies, we have very little information on true efficiency and tolerance of them.…”