1. United Medical Doctors, La Jolla, CA 92037, USA
2. Department of Psychology, College of Arts & Sciences, Undergraduate, Georgetown University, Washington, DC 20057, USA
3. Cardiology Division, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
4. Department of Cardiology, Kaiser Permanente, Northern California, Oakland, CA 94611, USA
5. Health Policy, Quality & Informatics Program, Michael E. DeBakey VA Medical Center Health Services Research & Development Center, Houston, TX 77030, USA
6. Section of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX 77030, USA