1. United Nations Office on Drugs and Crime. World Drug Report 2020. 2020. https://wdr.unodc.org/wdr2020/
2. Ambekar A, Agrawal A, Rao R, Mishra AK, Khandelwal SK, Chadda RK, on behalf of the group of investigators for the National Survey on Extent and Pattern of Substance Use in India. Magnitude of substance use in India. New Delhi: Ministry of Social Justice and Empowerment Government of India; 2019.
3. World Health Organization. The epidemiology and impact of gambling disorder and other gambling-related harm. WHO Forum on alcohol, drugs and addictive behaviours, WHO Geneva 2017. https://www.who.int/health-topics/addictive-behaviours#tab=tab_1.
4. Cheng C, Li AY. Internet addiction prevalence and quality of (real) life: a meta-analysis of 31 nations across seven world regions. Cyberpsychology Behav Soc Netw. 2014;17(12):755–60. https://doi.org/10.1089/cyber.2014.0317.
5. Alexander GC, Stoller KB, Haffajee RL, Saloner B. An epidemic in the midst of a pandemic: opioid use disorder and COVID-19. Ann Intern Med. 2020;173(1):57–8. https://doi.org/10.7326/M20-1141.