... RBC, red blood cell.Competing interests The author declares that he has no competing interests.Author details1Inserm, Unité de Recherche en Épidémiologie Systèmes d’Information et Modélisation ... Faubourg Saint Antoine, 75012 Paris, France. 2UPMC Univ Paris 06, 184 rue du Faubourg Saint Antoine, 75012 Paris, France. 3Assistance Publique - Hôpitaux de Paris, Hôpital Saint-Antoine, Service ... countries but was performed in only 86% of the transfusions in this study.Given the design of the study, it is not possible to state that there is a cause-and-eff ect relationship between older...