[1] JOHNS HOPKINS UNIV, SCH MED, BALTIMORE, MD USA
[2] MERCER UNIV, SCH MED, MACON, GA 31207 USA
[3] UNIV WESTERN ONTARIO, LONDON, ON, CANADA
[4] FEIN INC, HARTFORD, CT USA
[5] MED COLL WISCONSIN, MILWAUKEE, WI 53226 USA
[6] UNIV CALIF LOS ANGELES, SCH MED, LOS ANGELES, CA USA
[7] SUNY HLTH SCI CTR, SCH MED, SYRACUSE, NY USA
[8] CHILDRENS AID SOC, NEW YORK, NY USA
[9] HARVARD UNIV, SCH MED, BOSTON, MA USA