Comparison of esmolol and nitroglycerine on hemodynamic parameters during extubation in obese patients following laparoscopic cholecystectomy: a prospective randomized study - Chakravorty, Nupur; Chakravarty, Devashish; Vachhani, Rashim; Shidhaye, R. V. (Anaesthesia, Pain & Intensive Care, 2019)