Chowdhury A, Choudhury D, Majumdar U, Sen T. Effectiveness of pre-emptive thoracic epidural analgesia for acute post thoracotomy pain relief: a randomised blinded study. Int J Res Med Sci [Internet]. 2019 Sep. 25 [cited 2025 Oct. 14];7(10):3636-43. Available from: https://www.msjonline.org/index.php/ijrms/article/view/7165