[1] PARKLAND MEM HOSP,DEPT MED,DIV CARDIOL,DALLAS,TX
[2] MASSACHUSETTS GEN HOSP,DEPT MED,DIV CARDIOL,BOSTON,MA 02114
[3] SAN FRANCISCO GEN HOSP,DEPT MED,DIV CARDIOL,SAN FRANCISCO,CA 94110
[4] WAYNE STATE UNIV,SINAI HOSP,DEPT MED,DIV CARDIOL,DETROIT,MI 48201