- Mutations in the CLCN2 gene are a rare cause of idiopathic generalized epilepsy syndromes. Stogmann, E., Lichtner, P., Baumgartner, C., Schmied, M., Hotzy, C., Asmus, F., Leutmezer, F., Bonelli, S., Assem-Hilger, E., Vass, K., Hatala, K., Strom, T.M., Meitinger, T., Zimprich, F., Zimprich, A. Neurogenetics (2006)