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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: Addiction. 2021 Dec 23;117(5):1483–1490. doi: 10.1111/add.15768

FIGURE 1.

FIGURE 1

Flow-chart indicating how the enhanced heroin/morphine definition assigns deaths to each of the confirmed, probable and suspected heroin; probable pharmaceutical morphine; and unknown morphine source categories. COD = cause of death; ME/C = medical examiner/coroner; 6-AM = 6-acetylmorphine