1. Istanbul Okmeydanɥ Training and Research Hospital, Istanbul, Turkey.
2. Acibadem University School of Medicine, Istanbul, Turkey.
3. Acibadem Maslak Hospital, Istanbul, Turkey.
4. Dr. Siyami Ersek Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey.
5. Ahi Evren Chest and Cardiovascular Surgery Education and Research Hospital, Trabzon, Turkey.