Perioperative total tau as a biomarker of postoperative delirium after major cardiac surgery: A prospective cohort study. - Mahmoud, Mohamed R.; Abdelwahab, Ali T.; Abdelzaher, Tarek A.; Ali, Mohamed M.; Elsaghir, Salman Hamdy Mohamed; Hetta, Hassan Mokhtar Elshorbagy (Saudi Journal of Anaesthesia, 2026)