[1] Kaiser Permanente, Oakland, CA 94612 USA
[2] Harvard Univ, Sch Med, Brigham & Womens Hosp, Cambridge, MA 02138 USA
[3] Harvard Univ, Sch Publ Hlth, Cambridge, MA 02138 USA
[4] Mayo Clin, Rochester, MN USA
[5] Boston Univ, Sch Med, Boston, MA 02215 USA
[6] UT Southwestern, Dallas, TX USA
[7] Johns Hopkins, Baltimore, MD USA
[8] Ctr Dis Control & Prevent, Atlanta, GA USA
[9] NHLBI, Bethesda, MD USA
[10] Ctr Dis Control & Prevent, Natl Ctr Hlth Stat, Atlanta, GA USA
[11] Univ Calif San Francisco, San Francisco, CA 94143 USA
[12] Univ Alabama Birmingham, Birmingham, AL USA
[13] Northwestern Univ, Feinberg Sch Med, Evanston, IL 60208 USA
[14] Univ Cincinnati, Cincinnati, OH 45221 USA
[15] Univ Maryland, Sch Med, College Pk, MD 20742 USA
[16] Vet Adm Hlth Care Syst, Washington, DC USA
[17] Med Univ S Carolina, Charleston, SC USA
[18] Yale Univ, New Haven, CT 06520 USA
[19] Univ Michigan, Ann Arbor, MI 48109 USA
[20] Univ Pittsburgh, Pittsburgh, PA 15260 USA
[21] Colorado Permanente Med Grp, Denver, CO USA
[22] McGill Univ, Ctr Hlth, Montreal, PQ H3A 2T5, Canada
[23] Duke Univ, Ctr Med, Duke NUS Grad Med Sch, Durham, NC 27706 USA
[24] UT South Western Med Ctr, Dallas, TX USA
[25] Univ Penn, Philadelphia, PA 19104 USA
[26] NIH, Bethesda, MD USA
[27] Univ Michigan Hlth Syst, Ann Arbor, MI USA
[28] Univ Washington, Seattle, WA 98195 USA
[29] Univ Illinois, Chicago, IL USA
[30] Brigham & Womens Hosp, Boston, MA 02115 USA
[31] Michigan State Univ, E Lansing, MI 48824 USA
[32] NHLBI, NIH, Bethesda, MD USA
[33] Columbia Univ, New York, NY 10027 USA
[34] Univ So Calif, Los Angeles, CA 90089 USA
[35] Amer Heart Assoc, Dallas, TX USA
[36] Baylor Coll Med, Dept Vet Affairs, Houston, TX 77030 USA
[37] Univ Calif Irvine, Irvine, CA 92717 USA