@article{ref1,
title="Chinese cities scan sewers for signs of illegal drug use: privacy concerns and cultural differences could limit the technique's use in other nations",
journal="Nature",
year="2018",
author="Cyranoski, David",
volume="559",
number="",
pages="310-311",
abstract="Dozens of cities across China are applying an unusual forensic technique to monitor illegal drug use: chemically analysing sewage for traces of drugs, or their telltale metabolites, excreted in urine.  One southern city, Zhongshan, a drug hotspot, is also monitoring waste water to evaluate the effectiveness of its drug-reduction programmes, says Li Xiqing, an environmental chemist at Peking University in Beijing who is working with police in these cities ...",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}