1. West China Hospital, Sichuan University; Department of Neurology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
2. University of Aberdeen; Division of Applied Health Sciences; Polwarth Building Foresterhill Aberdeen UK AB25 2ZD
3. University of Edinburgh; Division of Clinical Neurosciences; Western General Hospital Crewe Rd Edinburgh UK EH4 2XU