1 Pacemaker Center. University of Southern California School of Medicine, 1420 San Pablo St., Los Angelas. CA 90033 USA (Michael Bilitch, M.D.) Rush-Presbyterian/St. Luke's Medical Center, 1753 West Congress Parkway, Chicago, IL linois 60612 USA (Robert G. Hausor. M.D.) Toronto General Hospital, 101 College St., Toronto, Ontarlo, M5G 1L7. Canada (Bernard S. Goldman, M.D.) Montefiore Hospital & Medical Center, 111 E. 210th St., Bronx, New York 10467 USA (Seymour Furman, M.D.) Pacemaker Center. Inc., Newark Beth Israel Hospital, 201 Lyons Ave., Newark, New Jersey 07112 USA (Victor Parsonnet, M.D.).