Fig. 1From: Metabolite biomarkers of type 2 diabetes mellitus and pre-diabetes: a systematic review and meta-analysisPRISMA flow diagram for the included studies of type 2 diabetes mellitus and pre-diabetes. After the removal of duplicates from the same database, 112 articles were found within the Cochrane Library, 984 within EMBASE, 689 within PubMed and 1287 within ScopusBack to article page