1. Department of Medicine University of California, Los Angeles, David Geffen School of Medicine Los Angeles California USA
2. Division of Pulmonary and Critical Care University of California, Los Angeles, David Geffen School of Medicine Los Angeles California USA
3. Division of Cardiology University of California, Los Angeles, David Geffen School of Medicine Los Angeles California USA
4. Division of Cardiothoracic Surgery University of California, Los Angeles, David Geffen School of Medicine Los Angeles California USA