Bondok, S. M. Y., M. M. R. Hassan, A. A. Kader, M. Helmi, and H. A. Ali. “COVID-19 Risk in Patients With Substance Use Disorders at Kuwait Addiction Treatment Center”. International Journal of Health Sciences, vol. 6, no. S6, July 2022, pp. 6007-24, doi:10.53730/ijhs.v6nS6.11284.