1. Division of Thoracic, Cardiac & Vascular Surgery, Department of Surgery, Faculty of Medicine, Syiah Kuala University, Dr. Zainoel Abidin General Hospital, Banda Aceh, Indonesia
2. Division of Adult Cardiac Surgery, Department of Thoracic, Cardiac & Vascular Surgery, Faculty of Medicine, Indonesia University, National Cardiovascular Center Harapan Kita, Jakarta, Indonesia