Evaluation of Surrogate Risk Factors for Severe Progression of COVID-19 in Tobacco Smoking Sub-Population and its Possible Amelioration by Immune Modulators. GJMR [Internet]. 2022 May 20 [cited 2026 Aug. 5];22(K2):67-79. Available from: https://medicalresearchjournal.org/index.php/GJMR/article/view/102185