1. The General Hospital of the People's Liberation Army (PLAGH); Nanlou Neurology; 28 Fuxing Road Haidian District Beijing Beijing China 100853
2. Beijing Institute of Traditional Chinese Medicine; Beijing Hospital of Traditional Chinese Medicine, affiliated with Capital Medical University; Beijing China 100010
3. University of York; Centre for Reviews and Dissemination; York UK Y010 5DD
4. Nottinghamshire Healthcare NHS Trust; Staff Library; Duncan MacMillan House Porchester Road Nottingham Nottinghamshire UK NG3 6AA
5. The Second Affiliated Hospital of Wenzhou Medical College; Department of Hand and Plastic Surgery; No 109, Xueyuan West Road Wenzhou Zhejiang China 325027
6. The General Hospital of PLA; Nanlou Neurology; 28 Fuxing Road Haidian District Beijing China 100853