How many guidelines use GRADE system in National Guideline Clearinghouse

Y. Chen, H. Xu, Q. Wang, X. Li, L. Yao, H. Luo, Y. Chen, H. Xu, M. Wang & K. Yang
Background: The Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system is considered to be a common, sensible and transparent approach to grading quality of evidence and strength of recommendations. Many guideline developers claimed that they have adopted GRADE system in their[for full text, please go to the a.m. URL]