1 Division of Cardiothoracic Surgery, Cardiovascular Institute (CVI), University of Pennsylvania, Smilow Center for Translational Research, Room 11-114A, 3400 Civic Center Blvd, Bldg 421, Philadelphia, PA 19104.
2 Division of Cardiothoracic Surgery, Cardiovascular Institute (CVI), University of Pennsylvania, Smilow Center for Translational Research, Room 11-114A, 3400 Civic Center Blvd, Bldg 421, Philadelphia, PA 19104. Electronic address: michael.ibrahim@pennmedicine.upenn.edu.