1. Department of Cardiology, The Heart Centre, Rigshospitalet; Copenhagen University Hospital; Denmark
2. Department of Cardiothoracic Anesthesia, The Heart Centre, Rigshospitalet; Copenhagen University Hospital; Denmark
3. Department of Cardiothoracic Surgery, The Heart Centre, Rigshospitalet; Copenhagen University Hospital; Denmark
4. Department of Cardiology; Johns Hopkins University Hospital; Baltimore MD USA