Lin Chen1, Miza Salim Hammoud2, Tara Karamlou2. 1. Department of Thoracic and Cardiovascular Surgery, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA. Electronic address: lxc451@case.edu. 2. Department of Thoracic and Cardiovascular Surgery, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA.