“Requirement of Postoperative Ventilation and Analgesics During Off-Pump Coronary Artery Bypass (OPCAB) Surgery – A Comparison Between Combined High Thoracic Epidural Anaesthesia (HTEA) With GA and GA Alone”. 2021. Bangladesh Heart Journal 36 (2): 74-81. https://doi.org/10.3329/bhj.v36i2.56032.