Letter: Preoperative phlebotomy in children with cyanotic heart disease.
D001815:Bloodletting; D002648:Child; D002675:Child, Preschool; D003490:Cyanosis / Q000601:surgery*; D004912:Erythrocytes; D006330:Heart Defects, Congenital / Q000601:surgery*; D006470:Hemorrhage / Q000517:prevention & control*; D006801:Humans; D011300:Preoperative Care; D014680:Veins