Shams, N., Z. Umar, L. Meraj, N. Ayub, M. Waseem, and K. A. Virk. “Post Covid-19 Syndromes, The Time Line of Covid”. Journal of Rawalpindi Medical College, vol. 26, no. 4, Jan. 2023, doi:10.37939/jrmc.v26i4.2013.