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\bibitem{Ivanova_etal2006} {\textquotedblleft}\textit{Spastin gene mutations in Bulgarian patients with hereditary spastic paraplegia}{\textquotedblright}. Ivanova N, L{\"o}fgren A, Tournev I, Rousev R, Andreeva A, Jordanova A, Georgieva V, Deconinck T, Timmerman V, Kremensky I, De Jonghe P, Mitev V, Clinical genetics \textbf{70}, 490 (2006).   http://doi.org/10.1111/j.1399-0004.2006.00705.x

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