- A Japanese family with spinocerebellar ataxia type 6 which includes three individuals homozygous for an expanded CAG repeat in the SCA6/CACNL1A4 gene. Takiyama, Y., Sakoe, K., Namekawa, M., Soutome, M., Esumi, E., Ogawa, T., Ishikawa, K., Mizusawa, H., Nakano, I., Nishizawa, M. J. Neurol. Sci. (1998)