1 Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, MN.
2 Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, MN; Department of Pediatrics and Adolescent Medicine, Mayo Clinic, Rochester, MN; Department of Biomedical Engineering, Mayo Clinic, Rochester, MN; Department of Clinical Anatomy, Mayo Clinic, Rochester, MN. Electronic address: [email protected].