[1] VA Med Ctr, Portland, OR 97239 USA
[2] Med Univ S Carolina, Charleston, SC USA
[3] UCSD, La Jolla, CA USA
[4] New York Med Coll, Valhalla, NY 10595 USA
[5] NYU, Sch Med, New York, NY 10003 USA
[6] Johns Hopkins Univ, Sch Med, Baltimore, MD 21218 USA
[7] Brigham & Womens Hosp, Boston, MA 02115 USA
[8] UT Southwestern, Dallas, TX USA
[9] Pacific Northwest Univ Hlth Sci, Yakima, WA USA
[10] Univ Calif Irvine, Irvine, CA 92717 USA
[11] Mayo Clin, Rochester, MN USA
[12] Univ Massachusetts, Amherst, MA 01003 USA
[13] NIH, Bethesda, MD USA
[14] Rhode Isl Cardiol Ctr, Providence, RI USA
[15] Duke Univ, Med Ctr, Duke Clin Res Inst, Durham, NC 27706 USA
[16] Univ Alabama Birmingham, Birmingham, AL USA
[17] Univ Connecticut, Sch Med, Storrs, CT USA