1. Heart Division, Royal Brompton and Harefield Hospitals and National Heart and Lung Institute, Imperial College, London SW3 6NP, UK
2. Center for Molecular Cardiology, University of Zurich, CH-8952 Schlieren-Zurich, Switzerland
3. Department of Physiology, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA
4. Barbra Streisand Women’s Heart Center, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
5. Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
6. Catholic University of the Sacred Heart, I-00168 Rome, Italy