Kazmi, S. K. S. .; Farooq, M. .; Shahzad, M. .; Rauf, M. K. .; Nasir, S. .; Zafar, S. . Use of Intravenous Vitamin C in Severe COVID Led to Reduction in ICU Stay and Severity of Disease. Pak J Chest Med 2021, 27, 323-328.