Affiliations:
1. MD, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2. MD, Department of cardiovascular surgery, Rasool akram hospital, Iran University of Medical Sciences (IUMS), Tehran, Iran
3. MD, Faculty of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.
4. MD, Department of Pathology, Iran University of Medical Sciences (IUMS), Tehran, Iran.

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