[1] Lenox Hill Hosp, New York, NY 10021 USA
[2] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
[3] Univ Calgary, Foothills Med Ctr, Calgary, AB, Canada
[4] Baptist Cardiac & Vasc Inst, Miami, FL USA
[5] Newark Beth Israel Med Ctr, Newark, NJ USA
[6] Univ Maryland, Sch Med, Baltimore, MD 21201 USA
[7] Univ Alabama Birmingham, Birmingham, AL USA
[8] Mayo Clin, Jacksonville, FL 32224 USA