1. Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
2. Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA, USA
3. Department of Vascular and Endovascular Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany
4. Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA
5. Department Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA, USA
6. Stanford University School of Medicine, Department of Obstetrics and Gynecology, Stanford, CA, USA
7. Department of Chemical and Materials Engineering, San Jose State University, San Jose, CA, USA