Compare The Perioperative Analgesic Effect of Ultrasound-Guided Thoracic Paravertebral Block and Ultrasound-Guided Serratus Anterior Block in Patients Undergoing Thoracotomy: A Randomized Trial. - Sedky, Asmaa M.; Soliman, Ahmed Mohamed; Aboeleneen, Khalid Mousa; Amar, Amany Said; Gaballah, Khaled M. (Zagazig University Medical Journal, 2026)