“…Reuben and Ekman 56 Randomised trial Fraudulent allegations reported in literature 69 11 retrospective cohort studies, 37,39,41,42,44,45,[62][63][64][65][66] two case-control studies 30,67 and two prospective randomised trials 40,46 ( Tables 2 and 3) that underwent qualitative analysis, of which eight retrospective cohort studies 37,39,41,42,44,45,62,64 and two case-control studies 30,67 on adult populations formed part of the meta-analysis. Table 4 shows the abstraction data and statistical parameters for all analysed studies.…”