Transfusion strategies for patients in pediatric intensive care units - Lacroix, J; Hébert, P C; Hutchison, J S; Hume, H A; Tucci, M; Ducruet, T; Gauvin, F; Collet, J P; Toledano, B J; Robillard, P; Joffe, A; Biarent, D; Meert, K; Peters, M JTRIPICU InvestigatorsCanadian Critical Care Trials GroupPediatric Acute Lung Injury and Sepsis Investigators Network (N Engl J Med, 2007)