A chief criticism was that each part of the study had too few rats to obtain statistically useful data, particularly because the strain of rat used, Sprague Dawley, develops tumors at a high rate over its lifetime.
一个主要批评是，这项研究的每一部分的大鼠都太少，无法获得统计上有用的数据，尤其是因为所使用的Sprague Dawley大鼠正常在其生命周期内都会以很高的速度发展成肿瘤。