Colak YZ, Ozgul U, Aslan DD, Cumurcu HB, Colak, C, Durmus M. The effects of sedation with propofol and propofol- ketamin combination on postoperative cognitive function in elderly patients undergoing spinal anesthesia. annalsmedres [Internet]. 2021 Jun. 28 [cited 2024 May 5];28(6):1201-5. Available from: http://www.annalsmedres.org/index.php/aomr/article/view/3819