1. Kim SY, Park JE, Seo HJ, Seo HS, Sohn HJ, Shin CM, Lee YJ, Jang BH. National Evidence-based Healthcare Collaborating Agency. NECA's guidance for undertaking systematic reviews and meta-analyses for intervention. Seoul: National Evidence-based Healthcare Collaborating Agency;2011.
2. Brouwers MC, Kho ME, Browman GP, Burgers JS, Cluzeau F, Feder G, Fervers B, Graham ID, Grimshaw J, Hanna SE, Littlejohns P, Makarski J, Zitzelsberger L. AGREE Next Steps Consortium. AGREE II: advancing guideline development, reporting, and evaluation in health care. Prev Med. 2010; 51:421–424.
Article
3. Schunemann H, Brozek J, Guyatt G, Oxman A. GRADE handbook: introduction to GRADE handbook [Internet]. [place unknown]: The GRADE Working Group;2013. cited 2015 Mar 16. Available from:
http://www.guidelinedevelopment.org/handbook.
6. Graham R. Institute of Medicine. Clinical practice guidelines we can trust. Washington, DC: National Academies Press;2011.