1. University of Edinburgh; Division of Clinical Neurosciences; Neurosciences Trials Unit, Bramwell Dott Building Western General Hospital, Crewe Road Edinburgh UK EH4 2XU
2. University of Edinburgh; College of Medicine and Veterinary Medicine; The Chancellor's Building 49 Little France Crescent Edinburgh UK EH16 4SB
3. West China Hospital, Sichuan University; Department of Neurology; No. 37, Guo Xue Xiang Chengdu Sichuan Province China 610041