[1] Columbia Univ, Ctr Med, New York, NY USA
[2] Cardiovasc Res Fdn, New York, NY USA
[3] Emory Univ, Sch Med, Atlanta, GA USA
[4] Auckland City Hosp, Auckland, New Zealand
[5] Duke Univ, Ctr Med, Durham, NC USA
[6] Hopitale Cardiol, Lille, France
[7] Cleveland Clin, Cleveland, OH 44106 USA
[8] AnMed Hlth, Anderson, SC USA
[9] Methodist Hosp, Indianapolis, IN USA
[10] Mayo Clin, Rochester, MN USA
[11] London Sch Hyg & Trop Med, London WC1, England
[12] Harvard Univ, Boston, MA USA
[13] NYU, Sch Med, New York, NY USA
[14] Osped San Raphael, Milan, Italy