Hereditary spastic paraplegia with mental impairment and thin corpus callosum in Tunisia: SPG11, SPG15 and further genetic heterogeneity.

Acknowledgments: The authors thank the family members for their participation. They also thank Drs Merle Ruberg and Cyril Goizet for critical reading of the manuscript, Drs Sylvie Forlani and Sylvain Hanein for their kind help and Drs Chahnez Triki and Fatma Kammoun for clinical examinations