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 ...
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, ...