| http://www.w3.org/ns/prov#value | - Problematic opiate use was defined as a positive urine toxicology for substances not prescribed by a physician (amphetamines, benzodiazepines, barbiturates, cannabinoids, cocaine, methadone, opiates phencyclidine, and propoxyphene), or a current substance abuse or dependence diagnosis for any substance (alcohol, cannabis, cocaine, hallucinogens, opiates, sedatives, stimulants or other substances),
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