[1] BOSTON UNIV,SCH MED,DEPT MED,PREVENT MED & EPIDEMIOL SECT,BOSTON,MA 02118
[2] UNIV MILAN,SAN GERARDO HOSP,DIV INTERNAL MED,I-20122 MONZA,ITALY
[3] UNIV BERN,MED POLIKLIN,CH-3010 BERN,SWITZERLAND
[4] FREEMAN RD HOSP,NEWMARKET,SUFFOLK,ENGLAND
[5] HEART FAILURE CTR,DIV CIRCULATORY PHYSIOL,NEW YORK,NY 10032
[6] STOCKHOLM SCH ECON,S-11383 STOCKHOLM,SWEDEN
[7] TUFTS UNIV NEW ENGLAND MED CTR,INST HLTH,BOSTON,MA 02111