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Filippi M, Alberoni M, Martinelli V, Sirabian G, Bressi S, Canal N, Comi G.Filippi M, et al.Eur Neurol. 1994;34(6):324-8. doi: 10.1159/000117071.Eur Neurol. 1994.PMID: 7851453
Filippi M, Martinelli V, Locatelli T, Medaglini S, Poggi A, Visciani A, Scotti G, Canal N, Comi G.Filippi M, et al.J Neurol. 1990 Jun;237(3):171-6. doi: 10.1007/BF00314590.J Neurol. 1990.PMID: 2370565