[1] Johns Hopkins Univ, Sch Med, Baltimore, MD 21287 USA
[2] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Baltimore, MD 21287 USA
[3] Ohio State Univ, Coll Publ Hlth, Columbus, OH 43210 USA
[4] NHLBI, NIH, Bethesda, MD 20892 USA
[5] Rush Univ, Med Ctr, Chicago, IL 60612 USA
[6] Boston Coll, Dept Sociol, Chestnut Hill, MA 02167 USA
[7] Ohio State Univ, Ctr Comprehens Canc, Columbus, OH 43210 USA
[8] Univ Calif Los Angeles, Sch Publ Hlth, Los Angeles, CA 90024 USA
[9] NCI, NIH, Bethesda, MD 20892 USA