Granella F
University Center for Adaptive Disorders and Headache (UCADH), Unit of Parma, Institute of Neurology, University of Parma, Strada del Quartiere 4, I-43100 Parma, Italy.
Ital J Neurol Sci. 1999 Apr;20(2 Suppl):S53-5. doi: 10.1007/pl00015001.