[1] Univ Bern, Dept Nucl Med, Inselspital, Bern, Switzerland
[2] Univ Bern, Dept Neurol, Sleep Wake Epilepsy Ctr, Inselspital, Bern, Switzerland
[3] Fudan Univ, Huashan Hosp, Dept Nucl Med, Shanghai, Peoples R China
[4] Fudan Univ, Huashan Hosp, PET Ctr, Shanghai, Peoples R China
[5] Fudan Univ, Huashan Hosp, Dept Neurol, Shanghai, Peoples R China
[6] Univ Bern, Dept Neurol, Bern, Switzerland