| 1. | Meng Q, Xu L, Zhang Y, et al. Trends in access to health services and financial protection in China between 2003 and 2011: a cross-sectional study. Lancet, 2012, 379: 805-814. | 
				                                                        
				                                                            
				                                                                | 2. | Yip WC-M, Hsiao WC, Chen W, et al. Early appraisal of China’s huge and complex health-care reforms. Lancet, 2012, 379: 833-842. | 
				                                                        
				                                                            
				                                                                | 3. | Lumbiganon P, Laopaiboon M, Gulmezoglu AM, et al. Method of delivery and pregnancy outcomes in Asia: the WHO global survey on maternal and perinatal health 2007 – 08. Lancet, 2010, 375: 490- 499. | 
				                                                        
				                                                            
				                                                                | 4. | Global Programme on Evidence for Health Policy: Guidelines for WHO guidelines. EIP/GPE/EQC/2003.1. Geneva: World Health Organization; 2003. | 
				                                                        
				                                                            
				                                                                | 5. | Oxman AD, Fretheim A, Schunemann HJ. Improving the use of research evidence in guideline development: introduction. Health Res Policy Syst, 2006, 4: 12. | 
				                                                        
				                                                            
				                                                                | 6. | IOM (Institute-of-Medicine). Clinical practice guidelines We Can trust. Washington, DC: The National Academies Press; 2011. | 
				                                                        
				                                                            
				                                                                | 7. | Schunemann HJ, Woodhead M, Anzueto A, et al. A guide for guidelines for professional societies and other developers of recommendations: an official American Thoracic society (ATS)/European Respiratory Society (ERS) Workshop Report. Proc Am Thorac Soc, in press. | 
				                                                        
				                                                            
				                                                                | 8. | Alonso-Coello P, Irfan A, Sola I, et al. The quality of clinical practice guidelines over the last two decades: a systematic review of guideline appraisal studies. Qual Saf Health Care, 2010, 19: e58. | 
				                                                        
				                                                            
				                                                                | 9. | Chen YL, Yao L, Xiao XJ, et al. Quality assessment of clinical guidelines in China: 1993 – 2010. Chin Med J, 2012, 125(20): 3660-3664. | 
				                                                        
				                                                            
				                                                                | 10. | Peking University Health Science Center: http://www.nhei.cn/export/sites/nhei/ennheis/wn/news/news_0009.html. | 
				                                                        
				                                                            
				                                                                | 11. | Guyatt GH, Oxman AD, Vist GE, et al. GRADE: an emerging consensus on rating quality of evidence and strength of recommendations. BMJ, 2008, 336: 924–926. | 
				                                                        
				                                                            
				                                                                | 12. | Schunemann HJ, Woodhead M, Anzueto A, et al. A vision statement on guideline development for respiratory disease: the example of COPD. Lancet, 2009, 373: 774-779. | 
				                                                        
				                                                            
				                                                                | 13. | AGREE Next Steps Consortium (2009): The AGREE II Instrument [Electronic version] AJ; 2012. at http://www.agreetrust.org. |