1. Medical School of Nantong University; Evidence-based Medicine Center; 19 Qixiu Road, Medical School of Nantong Nantong Jiangsu China 226001
2. West China Hospital, Sichuan University; Chinese Cochrane Centre, Chinese Evidence-Based Medicine Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
3. Evidence-based Medicine Center, Medical School of Nantong University; Nantong China
4. Nantong University; Institute of Nautical Medicine; 19 Qixiu Road Nantong Jiangsu China 226001