MITTAL, D., SINGH, J., KAUR, M., KUMAR, A. and KAUR, A. 2022. TO ESTIMATE THE LEVELS OF CA19-9 AND ITS SIGNIFICANCE IN DIAGNOSIS AND TREATMENT OF PANCREATICOBILIARY AND GASTROINTESTINAL MALIGNANCIES. Asian Journal of Pharmaceutical and Clinical Research. 15, 5 (May 2022), 125–127. DOI:https://doi.org/10.22159/ajpcr.2022.v15i5.44365.