Qasim , Maha. “Susceptibility of SARS-CoV-2 COVID-19 Infection Among Smokers Tobacco Users Upregulating the Expression of Angiotensin-Converting Enzyme-2 (ACE2)”. Perspective of Recent Advances in Medical Research Vol. 2 (December 30, 2022): 128–133. Accessed June 4, 2026. https://stm.bookpi.org/PRAMR-V2/article/view/9017.