Bhargava S, Tamaskar A, Chakravarty N, Shende S, Shidhaye RV. Comparative study of thoracic epidural fentanyl with sufentanil for postoperative pain relief in thoracic surgery. apic [Internet]. 29Jan.2019 [cited 3Jul.2024];:260-4. Available from: https://apicareonline.com/index.php/APIC/article/view/436