Kashif, M. et al. 2023. Positivity Rate of Universal PCR Screening for COVID-19 Pre-Endoscopy and its Impact on Diagnosis and Management of New Cancer Patients at a Cancer Centre in Pakistan. Pakistan Armed Forces Medical Journal. 73, 5 (Oct. 2023), 1293–1296. DOI:https://doi.org/10.51253/pafmj.v73i5.8050.