[1] Johns Hopkins Univ, Inova Ctr Outcomes Res, Baltimore, MD 21218 USA
[2] Univ Pittsburgh, Med Ctr, VA Pittsburgh Healthcare Syst, Pittsburgh, PA 15260 USA
[3] McGill Univ, Jewish Gen Hosp, Montreal, PQ, Canada
[4] Cleveland Clin, Nursing Res & Innovat & Heart & Vasc Inst, Cleveland, OH 44106 USA
[5] Duke Univ, Med Ctr, Durham, NC 27706 USA
[6] Univ Miami, Miller Sch Med, Univ Miami Hosp, Coral Gables, FL 33124 USA
[7] Univ Michigan, Frankel Cardiovasc Ctr, Ann Arbor Vet Affairs Hlth Syst, Ann Arbor, MI 48109 USA
[8] Univ N Carolina, Chapel Hill, NC 27515 USA
[9] Cleveland Clin, Cleveland, OH 44106 USA
[10] Univ Colorado, Denver, CO 80202 USA
[11] Univ Alberta, Edmonton, AB, Canada