Javed, .S. , Sehar, N. us ., Samreen, S. , Raza, M. , Sajjad, Q. and Saleemi, A. 2021. Comparison of Two Hours Fasting with Conventional 8 Hours Fasting Before Undergoing Upper Gastrointestinal Endoscopy: Fasting Before Undergoing Upper Gastrointestinal Endoscopy. Pakistan BioMedical Journal. 4, 2 (Dec. 2021), 263–267. DOI:https://doi.org/10.54393/pbmj.v4i2.154.