[1] Cedars Sinai Heart Inst, Los Angeles, CA 90048 USA
[2] Stanford Univ, Stanford, CA 94305 USA
[3] Univ Michigan, Ann Arbor, MI 48109 USA
[4] Univ Penn, Philadelphia, PA 19104 USA
[5] Med Univ South Carolina, Charleston, SC 29425 USA
[6] Drexel Univ, Philadelphia, PA 19104 USA
[7] Columbia Univ, New York, NY USA
[8] Newark Beth Israel Med Ctr, Newark, NJ USA
[9] Duke Univ, Durham, NC USA
[10] Univ Chicago, Chicago, IL 60637 USA
[11] Baylor Univ, Med Ctr, Dallas, TX USA
[12] Univ Utah, Salt Lake City, UT USA