[1] UNIV KENTUCKY, COLL MED, LEXINGTON, KY 40506 USA
[2] UNIV KENTUCKY, MED CTR, DEPT MED, DIV CARDIOVASC, LEXINGTON, KY 40506 USA
[3] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA
[4] HENRY FORD HOSP, DIV CARDIOVASC MED, DETROIT, MI 48202 USA
[5] CEDARS SINAI MED CTR, LOS ANGELES, CA 90048 USA
[6] UNIV CALIF LOS ANGELES, SCH MED, LOS ANGELES, CA 90024 USA
[7] MICHIGAN STATE UNIV, SCH MED, E LANSING, MI 48824 USA
[8] DAVENPORT COLL, CTR STUDY EMERGENCY MED SERV, GRAND RAPIDS, MI USA
[9] OHIO STATE UNIV, COLUMBUS, OH 43210 USA