Lapadula, G.; Marchesoni, A.; Salaffi, F.; Ramonda, R.; Salvarani, C.; Punzi, L.; Costa, L.; Caso, F.; Simone, D.; Baiocchi, G. Evidence-Based Algorithm for Diagnosis and Assessment in Psoriatic Arthritis: Results by Italian DElphi in Psoriatic Arthritis (IDEA). Reumatismo 2016, 68, 126-136.