1. Adult Substance Misuse Treatment Statistics 2019 to 2020: Report, 2020. Gov.uk 〈https://www.gov.uk/government/statistics/substance-misuse-treatment-for-adults-statistics-2019-to-2020/adult-substance-misuse-treatment-statistics-2019-to-2020-report〉.
2. Adult Substance Misuse Treatment Statistics 2020 to 2021: Report, 2021. Gov.uk. 〈https://www.gov.uk/government/statistics/substance-misuse-treatment-for-adults-statistics-2020-to-2021/adult-substance-misuse-treatment-statistics-2020-to-2021-report〉.
3. Alcohol and Drug Treatment for Adults: Statistics Summary 2017 to 2018, 2018. Gov.uk. 〈https://www.gov.uk/government/statistics/substance-misuse-treatment-for-adults-statistics-2017-to-2018/alcohol-and-drug-treatment-for-adults-statistics-summary-2017-to-2018〉.
4. A meta-analysis of retention in methadone maintenance by dose and dosing strategy;Bao;Am. J. Drug Alcohol Abus.,2009
5. Maintenance medication for opiate addiction: the foundation of recovery;Bart;J. Addict. Dis.,2012