世界卫生组织血红蛋白 A2（Hb A2）定量国际参考试剂（89/666）持续适用性评估。准确测定 Hb A2 是筛查 β-地中海贫血携带者的一项关键指标。室间质量评价（EQA）活动的数据显示，Hb A2 定量在方法内部以及不同方法之间均缺乏一致性。
Evaluation of the suitability of the World Health Organization International Reference Reagent for Hb A2 quantitation (89/666) for continued use. The accurate determination of Hb A2 is a key marker when screening for a β-thalassaemia carrier. Data from external quality assessment (EQA) exercises have shown a lack of alignment of Hb A2 quantitation both within and between methods.