Khan, S. N. ., and S. . Narang. “CORRELATIVE STUDY OF HISTOPATHOLOGICAL DIAGNOSIS WITH CLINICAL &Amp; ENDOSCOPIC DIAGNOSIS IN UPPER GASTROINTESTINAL ENDOSCOPIC BIOPSY AT TERTIARY CARE CENTER”. International Journal of Medical and Biomedical Studies, vol. 5, no. 2, Feb. 2021, doi:10.32553/ijmbs.v5i2.1737.