1University of Colorado Health Sciences Center, Denver
2University of Southern California, Los Angeles
3Milton S. Hershey Medical Center, Hershey, PA
4Bryan Memorial Hospital, Lincoln, Nebr.
5 Johns Hopkins Hospital, Baltimore
6Moffit Hospital, University of California, San Francisco, San Francisco
7Washington, D.C., Veterans Affairs Medical Center, Washington, D.C.
8Pfizer Global Research and Development, Ann Arbor, Mich.
9University of Wisconsin–Madison Medical School, Madison
10Clinical Cardiovascular Research, Gaithersburg, Md.
11Guidant Corporation, St. Paul, Minn.
12Jefferson Medical College, Philadelphia