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== Additional Resources ==
=== Reference ===
* [http://emedicine.medscape.com/article/287790-overview eMedicine Medical Library: Opioid Abuse]* [http://www.merckmanuals.com/professional/special_subjects/drug_use_and_dependence/opioids.html Merck Manual: Opioids: Drug Use and Dependence]* [http://www.merckmanuals.com/home/lung_and_airway_disorders/environmental_lung_diseases/occupational_asthma.html Merck Manual: Occupational Asthma]
=== Journal Articles ===
