[1] GEORGE WASHINGTON UNIV,SCH MED,DEPT SURG,WASHINGTON,DC
[2] GEORGE WASHINGTON UNIV,SCH MED,DEPT PEDIAT,WASHINGTON,DC 20052
[3] CHILDRENS HOSP,NASHVILLE,TN
[4] VANDERBILT UNIV,SCH MED,DEPT PEDIAT SURG,NASHVILLE,TN 37212
[5] CHILDRENS HOSP,WASHINGTON,DC 20010