1 Department of Thoracic and Cardiovascular Surgery, Taussig Cancer Center, Heart and Vascular Institute, Cleveland Clinic, 9500 Euclid Avenue / Mail Stop J4-1, Cleveland, OH, 44195, USA.
2 Department of Thoracic and Cardiovascular Surgery, Taussig Cancer Center, Heart and Vascular Institute, Cleveland Clinic, 9500 Euclid Avenue / Mail Stop J4-1, Cleveland, OH, 44195, USA. ahmadu@ccf.org.