Comment on

• A multicenter, randomized, controlled clinical trial of transfusion requirements in critical care. Transfusion Requirements in Critical Care Investigators, Canadian Critical Care Trials Group.

  Hébert PC, Wells G, Blajchman MA, Marshall J, Martin C, Pagliarello G, Tweeddale M, Schweitzer I, Yetisir E. Hébert PC, et al. N Engl J Med. 1999 Feb 11;340(6):409-17. doi: 10.1056/NEJM199902113400601. N Engl J Med. 1999. PMID: 9971864 Clinical Trial.