Engin, Muhammed Cagatay, Serdar Toy, and Mehmet Cenk Turgut. 2022. “A Comparison of Preoperative and Postoperative Anxiety Levels Affecting Preoperative and Postoperative Processes of Orthopedics Patients”. Annals of Medical Research 29 (6):580-84. http://www.annalsmedres.org/index.php/aomr/article/view/4131.