Modified thoracolumbar interfascial plane block versus epidural analgesia at closure for lumbar discectomy: a randomized prospective study - ÇELIK, Erkan; EKINCI, Mursel; YAYIK, Ahmet; AHISKALIOGLU, Ali; AYDI, Muhammed; KARAAVCI, Nuh (Anaesthesia, Pain & Intensive Care, 2020)