Combination of olanzapine with bispectral index guided anesthesia to prevent postoperative delirium in elderly patients undergoing major gastrointestinal elective surgery: a randomized, double-blind, placebo-controlled study protocol. Principles and Practice of Clinical Research, [S. l.], v. 7, n. 3, p. 35–42, 2021. DOI: 10.21801/ppcrj.2021.73.5. Disponível em: https://journal.ppcr.org/index.php/ppcrjournal/article/view/156.. Acesso em: 3 jul. 2024.