1. Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, USA
2. The Cardiovascular Research Foundation, New York, New York, USA
3. Department of Cardiology, NewYork-Presbyterian Hospital, Columbia University Medical Center, New York, New York, USA
4. Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden