Work overview

Section 05 of 08

Contributors

Longitudinal patterns of fentanyl utilisation (medical versus illicit sources) in the United States 2015–2023: a retrospective cohort study

Seungyeon Lee, Wenyu Song, David W. Bates, Richard D. Urman, and Ping Zhang · 2026

Contents

Section 05 of 08

  1. 01Introduction
  2. 02Methods
  3. 03Results
  4. 04Discussion
  5. 05Contributors
  6. 06Data sharing statement
  7. 07Editor note
  8. 08Declaration of interests
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Work overview

Section 5 of 8

Contributors

Seungyeon Lee, Wenyu Song, David W. Bates, Richard D. Urman, and Ping Zhang · about 1 minutes

WS and PZ conceptualized and supervised this study. SL and WS designed the longitudinal cohort study, and PZ processed and verified the dataset and methods underlying this study. SL conducted the data and statistical analysis. SL, WS, and PZ wrote the original draft, with critical contributions from DWB and RDU. DWB and RDU provided important clinical guidance. All authors assisted with the literature search, data analysis, and data interpretation. SL and PZ accessed and verified the underlying data. All authors read and approved the final manuscript and had final responsibility for the decision to submit for publication.