Additional file 1: of Chinese herbal medicine for the treatment of primary hypertension: a methodology overview of systematic reviews XinkeZhao YingdongLi MingxiaFeng KaiLiu KaibingChen YuqingLu ShaoboSun PengSong BinLiu 2016 Search strategy. The process of how to search PubMed, EMBASE, Cochrane library, CBM, CNKI, and Wang fang database was given in this file. (PDF 180 KB)