[1] CHILDRENS HOSP MED CTR, DEPT MED ENDOCRINOL, BOSTON, MA 02115 USA
[2] CHILDRENS HOSP MED CTR, DEPT RADIOL, BOSTON, MA 02115 USA
[3] CHILDRENS HOSP MED CTR, DEPT SURG UROL, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, DEPT PEDIAT, BOSTON, MA 02115 USA
[5] HARVARD UNIV, SCH MED, DEPT SURG, BOSTON, MA 02115 USA
[6] HARVARD UNIV, SCH MED, DEPT RADIOL, BOSTON, MA 02115 USA
[7] BURROUGHS WELLCOME CO, DEPT EXPTL THERAPEUT, RES TRIANGLE PK, NC 27709 USA