[1] St Louis VA Healthcare Syst, John Cochran VA Med Ctr, St Louis, MO USA
[2] St Louis Sch Med, St Louis, MO USA
[3] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
[4] Univ S Carolina, Sch Med Greenville, Greenville, SC USA
[5] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Boston, MA USA
[6] Ochsner Med Ctr, John Ochsner Heart & Vasc Inst, New Orleans, LA USA