[IMG]http://d.yimg.com/a/p/afp/20100513/capt.p***o_1273726660368-1-0.jpg?x=130&y=87&q=85&sig=Qc.B9gA.2oQtw9ylNU9QFw--[/IMG]AFP - The first time Wan Yannan took drugs eight years ago, she was a recent nursing graduate with a coveted job at a hospital -- a life that went up in a puff of heroin smoke.




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