5 Department of Neurology, IDIBAPS/Hospital Clinic, University of Barcelona, Barcelona, Spain 6 Department of Neurology, University Hospital Ulm, Ulm, Germany Correspondence to Dr Frank Leypoldt, ...
Correspondence to Dr Ding Ding, Department of Biostatistics and Epidemiology, Institute of Neurology, Huashan Hospital, Fudan Univeristy, Shanghai 200040, China; dingding{at}huashan.org.cn We have ...