Comparison of Postoperative Analgesic Effectiveness of Combined Intraperitoneal Instillation and Periportal Infiltration of Bupivacaine With Intraperitoneal Instillation or Periportal Infiltration Alone for Laparoscopic Cholecystectomy. J. Soc. Anesth. Nep. 2015, 1 (2), 59-64. https://doi.org/10.3126/jsan.v1i2.13571.