Raza, M., M. Raza, D. E. Cheema, M. Cheema, A. Rafique, and S. Khan. “EARLIEST SYMPTOMS OF PRESENTATION IN COVID-19 PATIENTS IN TERTIARY CARE HOSPITAL”. Pakistan Armed Forces Medical Journal, Vol. 71, no. Suppl-3, Dec. 2021, pp. S500-03, doi:10.51253/pafmj.v1i1.7941.