Emergency administration of fibrinogen concentrate for haemorrhage: systematic review and meta-analysis.

"Declarations Ethical approval and consent to participateApproval from the ethics board and patient consent were not required in our study since this was a systematic review and meta-analysis of publicly available data without any direct involvement of human participants. This study protocol has been funded through a protocol registry. The registry number is UMIN000041598. Consent for publicationNot applicable. Competing interestsThe authors of this work have nothing to disclose. Competing interests The authors of this work have nothing to disclose."

"Funding Not applicable."

"This study protocol has been published [] and registered in the UMIN (UMIN registration number: UMIN0000415989, URL https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000047487). This systematic review and meta-analysis was reported according to The Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols guidelines []."