- Professor Antonio Carolei, Clinica Neurologica, Dipartimento di Medicina Interna e Sanità Pubblica, Università degli Studi di L'Aquila, 67100 L'Aquila, Coppito, Italy
- Received March 30, 1999
- Revised July 20, 1999
- Accepted August 5, 1999
- First published March 1, 2000.
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