1 Department of Cardiothoracic and Vascular Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, 6400 Fannin St, Ste 2850, Houston, TX 77030. Electronic address: mehmet.alagoz@uth.tmc.edu.
2 Cardiovascular Surgery Department, Balıkesir University Medical School, Balıkesir, Turkey.