[1] MIT, Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 USA
[2] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Cardiac Catheterizat Lab,Cardiovasc Div, Boston, MA 02115 USA
[3] W Roxbury Vet Affairs Med Ctr, W Roxbury, MA USA
[4] Pfizer Inc, Millenium Pharmaceut, Clin Investigator Training Program, Cambridge, MA USA
[5] Primedica Corp, Worcester, MA USA