Affiliation: | 1. Yong Loo Lin School of Medicine, National University of Singapore, Singapore Department of Cardiac Thoracic and Vascular Surgery, National University Heart Centre, Singapore;2. Department of Cardiac Thoracic and Vascular Surgery, National University Heart Centre, Singapore School of Medicine, National University of Ireland, Galway, Ireland;3. Department of Cardiac Thoracic and Vascular Surgery, National University Heart Centre, Singapore;4. Department of Cardiac Surgery, Interbalkan European Medical Centre, Thessaloniki, Greece |