1. West China school of medicine, Sichuan University; No.37, Guoxue Alley Chengdu Sichuan China 610041
2. Academic Medical Center; Dutch Cochrane Centre; room J1b-108 PO Box 22700 Amsterdam Netherlands 1100 DE
3. Alkmaar Medical Center; Ophthalmology department; Wilhelminalaan 12 Alkmaar Netherlands 1815 JD
4. West China Hospital, Sichuan University; Chinese Evidence-Based Medicine Center; No.37 Guoxue Alley Chengdu Sichuan China 610041
5. West China Hospital, Sichuan University; Department of Ophthalmology; No.37 Guoxue Alley Chengdu Sichuan China 610041
6. Public Health School of West China,Sichuan University; Occupational Health Department; No.37 Guoxue Alley Chengdu Sichuan China 610041
7. West China Second University Hospital, Sichuan University, Department of Newborn Medicine, Affiliated Hospital of Luzhou Medical College; Department of Pediatrics; No. 17, Section Three, Ren Min Nan Lu Avenue Chengdu Sichuan China 610041