Naveed Nazir Shah, Khurshid Ahmad Dar, Syed Quibtiya, Bikram Singh Datta, Syed Suriya Farooq, and Mehvish Mushtaq. 2022. “Evaluation of Surrogate Risk Factors for Severe Progression of COVID-19 in Tobacco Smoking Sub-Population and Its Possible Amelioration by Immune Modulators”. Global Journal of Medical Research 22 (K2):67-79. https://medicalresearchjournal.org/index.php/GJMR/article/view/102185.