[1] Sichuan Univ, Dept Neurol, W China Hosp, Chengdu 610041, Peoples R China
[2] Univ Bern, Dept Neurol, Bern, Switzerland
[3] Sichuan Univ, Dept Genet, W China Hosp, Chengdu 610041, Peoples R China
[4] Sichuan Univ, Dept Psychiat, W China Hosp, Chengdu 610041, Peoples R China
[5] Tianjin First Ctr Hosp, Dept Neurol, Tianjin, Peoples R China