Importance of right control material When used in peer group reporting and EQA this becomes even more important-在同群组报告和EQA中这一点更加重要 Chances are that participants that is comparing to each other are using different reagent batches-很可能参加数据比对者使用的试剂都是不同的，其中的抗体也不一样– Different antibodies in each batch Differences between participants will be greater-不同参加者差异更大 CVs will be higher within Instrument and/or Method groups-同仪器/方法群组中CVs更高