Khan, H., K. Khan, S. Taj, and A. Zar. “Risk Factors and Symptoms Stratification and Mortality of COVID-19 in Population of Nowshera (Pakistan)”. Anaesthesia, Pain & Intensive Care, Vol. 24, no. 2, June 2020, pp. 196-04, doi:10.35975/apic.v24i2.1256.