| http://www.w3.org/ns/prov#value | - Researchers at Washington University School of Medicine in St. Louis published the survey???s results May 28 in the journal JAMA Psychiatry. ???In the past, heroin was a drug that introduced people to narcotics,??? said principal investigator Theodore J. Cicero, PhD. ???But what we???re seeing now is that most people using heroin begin with prescription painkillers such as OxyContin, Percocet or V
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