1. Plymouth UK
2. Chang Gung University; College of Medicine; Taoyuan Taiwan
3. Chang Gung Memorial Hospital, Linkou; Department of Dermatology; 5, Fuxing St Guishan Dist Taoyuan Taiwan 33305
4. Thame UK
5. Oxford Oxfordshire UK
6. Imperial College London; Pain Research, Department of Surgery and Cancer, Faculty of Medicine; London UK SW10 9NH