Perel, P; Clayton, T; Altman, DG; Croft, P; Douglas, I; Hemingway, H; Hingorani, A; ... PROGRESS Partnership; + view all Perel, P; Clayton, T; Altman, DG; Croft, P; Douglas, I; Hemingway, H; Hingorani, A; Morley, KI; Riley, R; Timmis, A; Van der Windt, D; Roberts, I; PROGRESS Partnership; - view fewer (2014) Red blood cell transfusion and mortality in trauma patients: risk-stratified analysis of an observational study. PLoS Med , 11 (6) , Article e1001664. 10.1371/journal.pmed.1001664.