[1] St Lukes Mid Amer Heart Inst, Kansas City, MO 64111 USA
[2] Univ Missouri, Kansas City, MO 64110 USA
[3] No Calif Kaiser Permanente Univ Calif, Oakland, CA USA
[4] Amer Coll Cardiol, Washington, DC USA
[5] Washington Univ, Sch Med, Barnes Jewish Hosp, St Louis, MO USA
[6] Yale Univ, Sch Med, New Haven, CT USA
[7] Univ Oklahoma, INTEGRIS Baptist Med Ctr, Sch Med, Oklahoma City, OK USA
[8] So Illinois Univ, Sch Med, Prairie Heart Inst, St Johns Hosp, Springfield, IL USA