[S]cores of young workers in the city of Suzhou...were poisoned by the chemical n-hexane, which they say was used to clean Apple components…An occupational diseases hospital which saw several victims diagnosed the problem and Wintek stopped using the chemical...[T]hree of the affected Wintek employees said team leaders told them they were working for Apple...Wintek…has paid medical fees for those affected and says it will pay compensation according to the law...Apple declined to answer questions about the poisonings…Instead it pointed to its code of conduct...Yunheng, could not be reached, but work safety officials in Suzhou have said eight employees were poisoned there as they carried out work sub-contracted by another firm, Surtec. A Surtec employee confirmed that it made Apple logos, but a spokesman said it knew nothing about Yunheng or the poisoning.