[1] Johns Hopkins Univ, Ciccarone Ctr Prevent Cardiovasc Dis, Div Cardiol, Baltimore, MD USA
[2] Univ Calif Los Angeles, Div Cardiol, Los Angeles, CA USA
[3] Emory Univ, Sch Med, Div Cardiol, Atlanta, GA USA
[4] Barbra Streisand Womens Heart Ctr, Cedars Sinai Smidt Heart Inst, Los Angeles, CA 90048 USA