Tariq, H.; Khan, S.; Ranjha, W.; Din, H. ud; Hashmi, S. N.; Akhtar, F.; Din, S. ud; Abid, K. FREQUENCY DETERMINATION OF NEGATIVE APPENDECTOMY AND UNUSUAL FINDINGS OF ACUTE APPENDICITIS: A RETROSPECTIVE STUDY. Pak J Pathol 2019, 30, 8-12.