[1] Georgetown Univ, Washington, DC USA
[2] Hosp St Pau & Santa Creu, Barcelona, Spain
[3] Otamendi Hosp, Buenos Aires, DF, Argentina
[4] Eurocor GmbH, Bonn, Germany
[5] Washington Hosp Ctr, Washington, DC 20010 USA
[6] Medstar Washington Hosp Ctr, Washington, DC USA
[7] Natl Heart Fdn Hosp & Res Inst, Dhaka, Bangladesh