[1] Univ Mississippi, Med Ctr, Dept Med, Jackson, MS 39216 USA
[2] Forrest Gen Hosp, Dept Med, Hattiesburg, MS USA
[3] Duke Univ, Div Cardiol, Sch Med, 2301 Erwin Rd, Durham, NC 27710 USA
[4] McMaster Univ, Canada Populat Hlth Res Inst, Dept Med, Hamilton, ON, Canada
[5] McMaster Univ, Canada Populat Hlth Res Inst, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[6] Northwestern Univ, Feinberg Sch Med, Div Cardiol, Dept Med, Chicago, IL 60611 USA
[7] Northwestern Univ, Feinberg Sch Med, Bluhm Cardiovasc Inst, Chicago, IL 60611 USA
[8] UT Southwestern Med Ctr, Dept Internal Med, Div Cardiol, Dallas, TX USA
[9] Univ Calif Los Angeles, David Geffen Sch Med, Div Cardiol, Med Ctr, Los Angeles, CA 90095 USA
[10] Baylor Scott & White Res Inst, Dallas, TX USA