1 Centro Cardiovascular Universitario and Instituto Nacional de Cirugia Cardiaca, Hospital de Clinicas, Universidad de la Republica, Montevideo, Uruguay.
2 Department of Surgery, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio.
3 Department of Cardiac Surgery, The University of Tokyo, Tokyo, Japan.
4 Division of Cardiac Surgery, University of Ottawa, Ottawa, Ontario, Canada.
5 Institute of Cardiovascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
6 Coronary Center, Department of Thoracic and Cardiovascular Surgery, Miller Family Heart, Vascular, & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio.
7 Department of Cardiothoracic Surgery, New York Presbyterian/Weill Cornell Medical Center, New York, NY.
8 Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, Calif.
9 Department of Cardiovascular and Thoracic Surgery, WVU Heart and Vascular Institute, West Virginia University, Morgantown, WVa.
10 Division of Cardiothoracic Surgery, Baylor College of Medicine, Houston, Tex.
11 Division of Cardiovascular Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa.
12 Department of Cardiac Surgery, Piedmont Heart Institute, Atlanta, Ga.
13 Instituto de Circurgia Cardiovascular, Faculdade de Medicina, Centro Universitário Fundação Assis Gurgacz, Cascavel, Paraná, Brazil.
14 Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
15 Cardiovascular Surgery, Pirajussara Hospital, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.
16 Department of Cardiothoracic Surgery, University of Texas Health Science Center, San Antonio, Tex.
17 Division of Cardiothoracic Surgery, University of Minnesota, Minneapolis, Minn.
18 Department of Cardio-Thoracic Surgery, Hospital de Santa Cruz, Carnaxide, Portugal.
19 Department of Cardiac Surgery, Cedars-Sinai Medical Center, Smidt Heart Institute, Los Angeles, Calif.
20 Coronary Center, Department of Thoracic and Cardiovascular Surgery, Miller Family Heart, Vascular, & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio. Electronic address: bakaeef@ccf.org.