Restrictive versus liberal transfusion strategy for red blood cell transfusion in critically ill patients and in patients with acute coronary syndrome: A systematic review, meta-analysis and trial sequential analysis

1. Melchor, J.R.
2. Francés, R.C.
3. Espinosa, Á.
4. Hurtado, E.M.
5. Pérez, R.N.
6. Gurumeta, A.A.
7. Basora, M.
8. Calvovecino, J.M.