Patients with clinically definite multiple sclerosis, white matter abnormalities on MRI, and normal CSF: if not multiple sclerosis, what is it?. Issue 2 (February 1995) - Fieschi, C; Gasperini, C; Ristori, G; Bastianello, S; Girmenia, F; Leuzzi, V; Buttinelli, C; Rasura, M