1 Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA.
2 Stanford Cardiovascular Institute, Stanford University, Stanford, CA, 94305, USA.
3 Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Biomedical Innovations Building, 240 Pasteur Drive, #3654, Stanford, CA, 94305, USA.
4 Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA. nleeper@stanford.edu.
5 Stanford Cardiovascular Institute, Stanford University, Stanford, CA, 94305, USA. nleeper@stanford.edu.
6 Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Biomedical Innovations Building, 240 Pasteur Drive, #3654, Stanford, CA, 94305, USA. nleeper@stanford.edu.