1 Department of Cardiothoracic and Vascular Surgery, McGovern Medical School, The University of Texas Health Science Center, 6400 Fannin St, Ste 2850, Houston, TX 77030. Electronic address: mehmet.alagoz@uth.tmc.edu.
2 Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas.