[1] MIRIAM HOSP, PROVIDENCE, RI 02906 USA
[2] UNIV CALIF SAN FRANCISCO, CARDIOVASC RES INST, SAN FRANCISCO, CA 94143 USA
[3] SUNNYBROOK MED CTR, TORONTO M4N 3M5, ONTARIO, CANADA
[4] UNIV COLORADO, DENVER, CO 80202 USA
[5] UNION UNIV ALBANY MED COLL, ALBANY, NY 12208 USA
[6] UNIV MINNESOTA, SCH MED, MINNEAPOLIS, MN 55455 USA
[7] VIRGINIA COMMONWEALTH UNIV, MED COLL VIRGINIA, RICHMOND, VA 23298 USA
[8] UNIV UPPSALA, INST FORENS MED, S-75105 UPPSALA, SWEDEN
[9] UNIV TEXAS, HLTH SCI CTR, DALLAS, TX 75235 USA
[10] ST PAULS HOSP, VANCOUVER V6Z 1Y6, BC, CANADA