“…The most frequent comparator to PCC was FFP with two studies investigating PCC only in comparison to FFP only 23,36 and nine studies investigating a combination of PCC and FFP in comparison to FFP only 24,26,28,31‐34,38,39 . Other comparators included rFVII, which was compared with PCC in four studies 27,29,35,37 . In one study that was conducted in Jehovah's Witness patients, the comparator consisted of not giving any coagulation factor or transfusion product, 30 and in one study the comparator was standard care that was not further specified 25 .…”