9.Methods Levels of HPVB19-IgM in plasma of 541 cases of children were determined with enzyme linked immunosobent assay (ELISA) method, including 158 leukemia, 218 ITP, and 102 anaemia cases.

• 方法:应用酶联免疫法(ELISA)测定血液中HPVB19-IgM,共检测白血病患儿158例,血小板减少性紫癜(ITP)281例,贫血患儿102例,共计541例。