Miale J B
Thromb Haemost. 1979 Dec 21;42(4):1132-4.
The ICTH/ICSH collaborative study failed to achieve its aims because each combination of plasma, thromboplastin and method was tested by too few laboratories in relation to intra and inter laboratory variation, and because the stability of the reference thromboplastin 70/178 is suspect. The evidence of the study does not support the superiority of reference thromboplastins over reference plasmas, but the concept of reference plasma was not adequately explored.
国际血栓与止血学会（ICTH）/国际血液学标准化委员会（ICSH）的合作研究未能实现其目标，原因如下：与实验室内和实验室间的变异相比，每个血浆、凝血活酶和方法的组合仅由少数实验室进行测试；此外，参考凝血活酶70/178的稳定性也存在疑问。该研究的证据并不支持参考凝血活酶优于参考血浆，但参考血浆的概念并未得到充分探讨。
