1. Division of Cardiology, Stanford Cardiovascular Institute; Stanford University School of Medicine; Stanford CA USA
2. Friedrich-Alexander Universitaet Erlangen-Nürnberg; Erlangen Germany
3. Imperial Centre for Cardiac Engineering; Imperial College London; London UK
4. Veterans Affairs Palo Alto Health Care System; Palo Alto CA USA
5. Division of Cardiology; Brigham and Women's Hospital; Boston MA USA