Data sources and search strategies

Two reviewers (WYL and HZG) systematically searched for RCTs in Chinese database including China National Knowledge Infrastructure (CNKI), Chinese Scientific Journals Database (VIP), Wanfang Data, Sinomed and English database containing pubmed, embase, web of science, Cochrane, clinicaltrial from the construction of the database to 1 February 2020. We used the search strategies containing the comprehensive terms in English databases as following: (medicine, Chinese traditional OR traditional Chinese medicine OR herbal medic* OR Chinese herb* OR plant* OR medicinal plant* OR decoction OR powder OR granules OR complementary medicine or alternative medicine) and (glomerulonephritis, membranous OR membranous nephropathy OR membranous glomerulonephritis OR nephropathy, membranous OR membranous glomerulopathy OR membranous glomerulonephropathy OR idiopathic membranous glomerulonephritis OR idiopathic membranous nephropathy OR heymann nephritis OR nephritis, heymann) and “膜性肾病” or “膜性肾小球肾炎” and“中医药” or “中医” in Chinese databases. There were no limitations of language, document type (journal paper, proceedings and postgraduate theses) or publication status for the trials.