Öztürk, İbrahim, and S. Öztürk. “Association Between Postoperative Atrial Fibrillation and the Levels of Hemoglobin or Hematocrit: A Systematic Review and Metaanalysis”. Anaesthesia, Pain & Intensive Care, Jan. 2019, pp. 247-53, https://mail.apicareonline.com/index.php/APIC/article/view/353.