[1] Univ Calif Davis, Dept Med, Div Cardiovasc Med, Sacramento, CA USA
[2] Keck Sch Med USC, Sch Med, Los Angeles, CA USA
[3] UCLA, Div Cardiol, Dept Med, David Geffen Sch Med, Los Angeles, CA USA
[4] Vet Affairs Greater Los Angeles Healthcare Syst, Div Cardiol, Los Angeles, CA USA
[5] UCLA, Dept Med Stat Core, David Geffen Sch Med, Los Angeles, CA USA
[6] UCLA, Dept Med, David Geffen Sch Med, 2-237 CHS, Mail Code 167917650, Charles E Young Dr, Los Angeles, CA 90095 USA