[1] Harvard Med Sch, Brigham & Womens Hosp, Boston, MA 02115 USA
[2] Minneapolis VA Hlth Care Syst, Minneapolis, MN USA
[3] BHF Glasgow Cardiovasc Res Ctr, Glasgow, Lanark, Scotland
[4] Univ Med Ctr Groningen, Groningen, Netherlands
[5] Natl Heart Ctr Singapore, Singapore, Singapore
[6] St Lukes Mid Amer Heart Inst, Kansas City, MO USA
[7] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[8] Univ Nacl Cordoba, Cordoba, Argentina
[9] Yale Sch Med, New Haven, CT USA
[10] Duke Univ, Med Ctr, Duram, NC USA