N-acetylcysteine reduces severity and mortality in COVID-19 patients: A systematic review and meta-analysis. J. Adv. Vet. Anim. Res [Internet]. 2023 Jun. 30 [cited 2026 Jul. 3];10(2):157-68. Available from: https://www.banglajol.info/index.php/JAVAR/article/view/80383