| http://www.w3.org/ns/prov#value | - Uncertain dosage levels (due to differences in purity), the use of unsterile equipment, contamination of heroin/opium with dotting agents, or the use of heroin/opium in combination with such other drugs as alcohol or cocaine can cause serious health problems such as serum hepatitis, skin abscesses, inflammation of the veins, and cardiac disease.
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