Institution: | 1. Department of Adult Cardiac Surgery, Prince Sultan Cardiac Center, Riyadh, Saudi Arabia;2. Department of Adult Cardiology, Prince Sultan Cardiac Center, Riyadh, Saudi Arabia;3. Department of Cardiothoracic Surgery, Mansoura University, Mansoura, Egypt;4. Institute of Cardiology, University of L''Aquila, L''Aquila, Italy |