[1] Tufts Univ, Medford, MA 02155 USA
[2] Univ Alabama Birmingham, Birmingham, AL USA
[3] Boston Univ, Sch Med, Boston, MA 02215 USA
[4] Johns Hopkins Univ, Sch Med, Baltimore, MD 21218 USA
[5] Univ Vermont, Burlington, VT 05405 USA
[6] Childrens Hosp Boston, Boston, MA USA
[7] Inst Univ Cardiol & Pneumol Quebec, Ctr Rech, Quebec City, PQ, Canada
[8] Univ Calif San Francisco, San Francisco, CA 94143 USA
[9] Kaiser Permanente, Oakland, CA USA
[10] Northwestern Univ, Evanston, IL 60208 USA
[11] Univ Cincinnati, Acad Hlth Ctr, Cincinnati, OH 45221 USA
[12] Med Univ S Carolina, Charleston, SC USA
[13] Yale Univ, Sch Publ Hlth, New Haven, CT 06520 USA
[14] Univ Michigan, Ann Arbor, MI 48109 USA
[15] Brown Univ, Providence, RI 02912 USA
[16] Univ Pittsburgh, Pittsburgh, PA 15260 USA
[17] Duke Univ, Durham, NC 27706 USA
[18] Univ Texas Southwestern Med Ctr, Houston, TX USA
[19] Univ Penn, Philadelphia, PA 19104 USA
[20] NIH, Bethesda, MD USA
[21] Baptist Hlth Med Grp, Houston, TX USA
[22] Univ Washington, Seattle, WA 98195 USA
[23] Stanford Univ, Sch Med, Stanford, CA 94305 USA
[24] Univ Illinois, Chicago, IL USA
[25] Michigan State Univ, E Lansing, MI 48824 USA
[26] Wake Forest Univ, Winston Salem, NC 27109 USA
[27] NHLBI, Bethesda, MD USA
[28] Columbia Univ, New York, NY 10027 USA
[29] Univ So Calif, Los Angeles, CA 90089 USA
[30] Amer Heart Assoc, Houston, TX USA
[31] Baylor Coll Med, Michael E DeBakey VA Med Ctr, Hlth Serv Res & Dev Ctr Innovat, Methodist DeBakey Heart & Vasc Ctr,Michael E DeBa, Houston, TX 77030 USA
[32] Univ Cincinnati, Cincinnati, OH 45221 USA
[33] Massachusetts Gen Hosp, Boston, MA 02114 USA