Chinese school with mass illness is deemed safe, but many doubt findings
常州学校“毒地”调查：官方结论遭质疑
The New York Times, September 1, 2016
EN: http://www.nytimes.com/2016/09/01/world/asia/china-changzhou-school-toxins.html
CH: http://cn.nytimes.com/china/20160901/china-changzhou-school-toxins/