“…Combined methods to assess BC. The main aims of these studies in combining different methods were to (1) validate a BC method against an established reference (12 studies) 10,11,22,25,27,31,[75][76][77][78][79][80] and/or evaluate the agreement between different methods (11 studies) 32,37,38,40,[81][82][83][84][85][86] without specifying a reference BC method and (2) combine different methods (14 studies) 23,26,44,53,55,[87][88][89][90][91][92][93][94][95] to have a more precise BC evaluation. Table S1 in the supplementary material shows the characteristics, main aims, and findings of these studies.…”