The poisonings were mentioned in a recent report from Apple, which sources many of its strong-selling iPhones, iPads and other devices to contract manufacturers in China. That report said 137 workers had been hospitalised because of poisoning but had all recovered, a conclusion also offered by Wintek. Apple declined to comment on the workers' letter and referred a reporter back to its supplier report...Wintek spokesman Jay Huang told Reuters that all staff who needed medical treatment because of the n-hexane poisoning had been treated, and that the company has reverted to using alcohol to clean the panels that it manufactures for Apple.