1. Department of Medicine; University of Southern California; Los Angeles California USA
2. Colorado School of Public Health; Aurora CO USA
3. Department of Epidemiology and Prevention; Wake Forest University School of Medicine; Winston Salem North Carolina USA
4. Department of Medicine; Wake Forest University School of Medicine; Winston Salem North Carolina USA
5. Department of Biostatistical Sciences; Wake Forest University School of Medicine; Winston Salem North Carolina USA
6. National Institutes of Health/Clinical Center; Bethesda Maryland USA
7. Department of Epidemiology; John Hopkins University; Baltimore Maryland USA