[1] ST FRANCIS HOSP,EVANSTON,IL
[2] KENTUCKY PEDIAT RES,BARDSTOWN,KY
[3] PHYSICIANS PLUS MED GRP,MADISON,WI
[4] RANDOLF INTERNAL MED ASSOCIATES,CHARLOTTE,NC
[5] PEDIAT CTR SW MICHIGAN,KALAMAZOO,MI
[6] BOULDER MED CTR,BOULDER,CO
[7] RIVERCHASE CLIN RES PC,BIRMINGHAM,AL
[8] PEDIAT ASSOCIATES ORLANDO,ORLANDO,FL
[9] MID AMER FAMILY HLTH,OMAHA,NE
[10] HIGHLAND CLIN,SHREVEPORT,LA
[11] CALIF MED RES GRP,FRESNO,CA
[12] SCOTTSDALE PEDIAT CTR,SCOTTSDALE,AZ
[13] DOCTORS MED CTR,HAMILTON,OH
[14] MITCHELL CLIN & RES CTR,MCKINNEY,TX
[15] DEAN MED CTR,OREGON,WA
[16] RES HLTH INC,HOUSTON,TX
[17] UNIV ROCHESTER,MED CTR,ROCHESTER,NY 14642
[18] MED ASSOCIATES CLIN,DUBUQUE,IA