Articles that support this problem:
Decisions about lumping vs. splitting of the scope of systematic reviews of complex interventions are not well justified: a case study in systematic reviews of health care professional reminders
2012 : Journal of clinical epidemiology
Cochrane systematic reviews of interventions for risk factors correlate weakly with global risk factor burden: a cross-sectional study
2018 : Journal of clinical epidemiology
Assessing harmful effects in systematic reviews
2004 : Bmc medical research methodology
Divine intervention? A Cochrane review on intercessory prayer gone beyond science and reason
2009 : Journal of negative results in biomedicine