Strict red blood cell transfusion guideline reduces the need for transfusions in very-low-birthweight infants in the first 4 weeks of life: a multicentre trial - Santos, Amélia Miyashiro Nunes dos; Guinsburg, Ruth; Kopelman, Benjamin Israel; Peres, Clóvis de Araújo; Taga, Marcel Frederico de Lima; Shinzato, Alexandre Ryuzo; Costa, Helenice de Paula Fiod (Vox Sanguinis- International Journal Of Transfusion Medicine, 2005)