1. From the Department of Clinical and Experimental Medicine (M.N.D.D.M., S.I., R.P., R.S., G.D.M.), Regional Reference Centre for Coagulation Disorders (M.N.D.D.M., G.D.M.), and Rheumatology Research Unit, Psoriatic Arthritis Clinic (S.I., R.P., R.S.), Federico II University, Naples, Italy.