1. Cardiovascular Research Center, Division of Cardiothoracic Surgery, Department of Surgery, Rhode Island Hospital, Providence, RI 02903, USA
2. Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
3. Alfaisal University, College of Medicine, Riyadh 11533, KSA
4. Faculdade de Ciencias Medicas da Santa Casa de Sao Paulo, Brazil
5. Imclone, New York, NY 10016, USA