1. Beijing University of Chinese Medicine; Centre for Evidence-Based Chinese Medicine; 11 Bei San Huan Dong Lu, Chaoyang District Beijing China 100029
2. University of Tromso; National Research Centre in Complementary and Alternative Medicine (NAFKAM); Tromso Norway 9037
3. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 3344, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. West China Hospital, Sichuan University; Department of Clinical Immunology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
5. Shandong University; Dept of Medical Statistics College of Public Health; No 44 Wenhua Xi Lu Shandong Province Jinan China 250012
6. West China Hospital, Sichuan University; Chinese Cochrane Centre, Chinese Evidence-Based Medicine Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
7. University of Tromso; National Center for Research in Alternative Medicine; Tromso Norway 9037