作者单位：Childrens Hosp Los Angeles, Dept Qual Improvement & Patient Safety, Los Angeles, CA 90027 USA[1]Childrens Hosp Los Angeles, Dept Pathol & Lab Med, Transfus Med, Sugar Land, TX USA[2]Childrens Hosp Los Angeles, Dept Informat Serv, Los Angeles, CA 90027 USA[3]
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