[1] Univ Alabama Birmingham, Birmingham, AL USA
[2] Univ Calif San Francisco, San Francisco, CA 94143 USA
[3] Univ Calif Los Angeles, UCLA Div Cardiol, Los Angeles, CA USA
[4] Newyork Med Coll, Valhalla, NY USA
[5] Univ Calif, Fresnow, CA USA
[6] Emory Univ, Sch Med, Atlanta, GA USA