Comparison between dexamethasone and dexmedetomidine combined with bupivacaine on pain relief after shoulder arthroscopy: A randomized clinical trial. - Abd El Sabour, Ahmed I.; Attia, Alaa M. A.; Abdelsalam, Mohamed A.; Baset, Hassnaa M. A.; Ali, Wesam N. (Saudi Journal of Anaesthesia, 2026)