1. Division of Cardiology, Department of Internal Medicine, Center for Advanced Cardiac Care, Columbia University Medical Center, 622 W 168 St, P.H. 12-1291, New York, NY 10032, USA
2. Nuclear Cardiology Laboratory, Division of Cardiology, Department of Internal Medicine, Columbia University Medical Center, 622 W 168th St, PH 10-203, New York, NY 10032, USA
3. Division of Cardiology, Department of Internal Medicine, Center for Interventional Vascular Therapy, Columbia University Medical Center, 173 Fort Washington Ave, 4th Floor, New York, NY 10032, USA
4. Department of Biostatistics, Columbia University Mailman School of Public Health, 722 West 168th Street, 6th Floor, New York, NY 10032, USA