[1] Univ Calif San Francisco, Div Cardiol, San Francisco, CA 94143 USA
[2] Stanford Univ, Palo Alto, CA 94304 USA
[3] Univ Paris Diderot, Paris, France
[4] Pfizer Inc, New York, NY USA
[5] Quebec Heart & Lung Inst, Quebec City, PQ, Canada
[6] San Francisco Gen Hosp, Div Cardiol, San Francisco, CA 94110 USA