[1] Univ Michigan, CS Mott Childrens Hosp, Dept Surg, Sect Pediat Surg,Sch Med, Ann Arbor, MI 48109 USA
[2] Cincinnati Childrens Hosp Med Ctr, Div Pediat Urol, Cincinnati, OH USA
[3] Washington Univ, Sch Med, Edward Mallinckrodt Inst Radiol, St Louis, MO 63110 USA
[4] Childrens Hosp, Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA 02115 USA
[5] Univ Tennessee, Coll Med Chattanooga, TC Thompson Childrens Hosp, Div Pediat Hematol Oncol, Chattanooga, TN USA
[6] Univ Florida, Childrens Oncol Grp Stat & Data Ctr, Dept Biostat, Gainesville, FL USA
[7] Childrens Natl Med Ctr, Div Pediat Oncol, Washington, DC 20010 USA
[8] Northwestern Univ, Dept Pathol, Feinberg Sch Med, Dept Pathol,Lurie Childrens Hosp Chicago, Chicago, IL 60611 USA
[9] Cincinnati Childrens Hosp Med Ctr, Div Pediat Oncol, Cincinnati, OH USA