1. Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
2. Regeneron Pharmaceuticals Inc., Tarrytown, NY 10591, USA
3. School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA
4. Section on Cardiovascular Medicine, Department of Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
5. Center on Aging and Health, Johns Hopkins University, Baltimore, MD 21218, USA
6. School of Public Health, University of Alabama at Birmingham, Birmingham, AL 35294, USA
7. Medical School, University of Minnesota, Minneapolis, MN 55455, USA