1 From the Institute of Neurology (G.P., D.P., D.S., S.S.) and the Institute of Internal Medicine (F.F., F.S., A.G.), Catholic University, Rome, Italy.
2 From the Institute of Neurology (G.P., D.P., D.S., S.S.) and the Institute of Internal Medicine (F.F., F.S., A.G.), Catholic University, Rome, Italy. s.servidei@rm.unicatt.it.