Finzel S, Kraus S, Schmidt S, Hueber A, Rech J, Engelke K, Englbrecht M, Schett G. Bone anabolic changes progress in psoriatic arthritis patients despite treatment with methotrexate or tumour necrosis factor inhibitors. Ann Rheum Dis (2013) 72:1176–1181. doi:10.1136/annrheumdis-2012-201580