1. Center for Disease Control and Prevention.Understanding the opioid overdose epidemic.2022.https://www.cdc.gov/opioids/basics/epidemic.html. Accessed 3 May 2023.
2. Center for Disease Control and Prevention.Overdose death rates involving opioids by type United States 1999–2020. 2022.https://www.cdc.gov/drugoverdose/data/OD‐death‐data.html. Accessed 25 Jul 2022.
3. Postmortem Toxicology of New Synthetic Opioids
4. NPS Discovery.Q3 recommended scope for NPS testing in the United States. Center for Forensic Science Research and Education. 2021.https://www.npsdiscovery.org/wp‐content/uploads/2021/11/Q3‐2021‐NPS‐Scope‐Recommendations_NPS‐Discovery_110221.pdf. Accessed 25 Jul 2022
5. NPS Discovery.AP‐237 monograph. National Medical Services Labs.https://www.npsdiscovery.org/wp‐content/uploads/2019/09/AP‐237_091619_NMSLabs_Report.pdf. Accessed 25 Jul 2022.