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(("Opioid-Related Disorders"[Majr]) AND ("Legislation as Topic"[Mesh] OR "Legislation" [Publication Type] OR "legislation and jurisprudence" [Subheading] OR "Legal Case" [Publication Type])) AND ("Ethics"[Mesh] OR "ethics" [Subheading] OR "Ethics, Research"[Mesh] OR "Ethics Committees, Clinical"[Mesh] OR "Principle-Based Ethics"[Mesh] OR "Ethics, Clinical"[Mesh] OR "Bioethics"[Mesh])