Espir M L, Hall J W, Shirreffs J G, Stevens D L
Br Med J. 1970 Feb 14;1(5693):423-5. doi: 10.1136/bmj.1.5693.423.
Four out of five members of a team of farmworkers who had been using various herbicides and pesticides in intensive agriculture became impotent. Sexual function recovered after further contact with the chemicals was stopped and hormone therapy had been given, though in one case this took about a year. We have not been able to incriminate one particular substance, but with the circumstantial evidence and the lack of any other obvious cause it seems likely that the impotence was due to the toxic effects of one or more of the chemicals being used.
一个在集约化农业中使用各种除草剂和杀虫剂的农场工人群体中，五分之四的成员出现了阳痿症状。在停止进一步接触这些化学物质并进行激素治疗后，性功能恢复了，不过有一例这种恢复过程持续了大约一年。我们未能确定是哪一种特定物质导致的，但根据间接证据以及缺乏任何其他明显原因来看，阳痿似乎是由于所使用的一种或多种化学物质的毒性作用所致。
