Preferred reporting items for overviews of systematic reviews including harms checklist: a pilot tool to be used for balanced reporting of benefits and harms

The PRIO-harms tool can be used in every OoSRs that addresses health care interventions. This instrument will assist overview authors to improve completeness and transparency of research reporting with emphasis on harms. However, it might benefit from critical review and further validation from experts and research teams that produce OoSRs.