From the University “La Sapienza,” Cattedra di I Clinica Medica, Andrea Cesalpino Foundation (C.F., G.D., M.P., G.D.M.), Rome; and the University of L’Aquila, Departments of Experimental (C.B.) and Internal (M.V., A.S.) Medicine, L’Aquila, Italy. (At 1999-10)
