1. 1. Substance Abuse and Mental Health Services Administration. Mental Health and Substance Use Disorders 2020. Available from: https://www.samhsa.gov/find-help/disorders. Accessed 2021 Feb 15.
2. 2. Substance Abuse and Mental Health Services Administration (SAMHSA). Key Substance Use and Mental Health Indicators in the United States: Results from the 2018 National Survey on Drug Use and Health2019. Available from: https://www.samhsa.gov/data/sites/default/files/cbhsq-reports/NSDUHNationalFindingsReport2018/NSDUHNationalFindingsReport2018.pdf. Accessed 2021 Feb 15.
3. Laboratory-induced cue reactivity among individuals with prescription opioid dependence;Back;Addict Behav,2014
4. 4. Pool ER, Sander D. Vulnerability to relapse under stress: insights from affective neuroscience. Swiss Med Wkly. 2019;149:w20151.
5. How does stress increase risk of drug abuse and relapse;Sinha;Psychopharmacology,2001