[1] Univ Texas Southwestern Med Ctr Dallas, Dept Urol, 2001 Inwood Rd,WCBE3,4th Floor, Dallas, TX 75390 USA
[2] Univ Cambridge, Dept Pathol, Cambridge, England
[3] Cambridge Univ Hosp NHS Fdn Trust, Dept Paediat Hematol & Oncol, Cambridge, England
[4] Cambridge Univ Hosp NHS Fdn Trust, Dept Histopathol, Cambridge, England
[5] Dana Farber Boston Childrens Canc & Blood Disorde, Boston, MA USA
[6] Childrens Hosp Los Angeles, Canc & Blood Dis Inst, Los Angeles, CA USA
[7] Univ Southern Calif, Keck Sch Med, Dept Pediat, Los Angeles, CA 90007 USA
[8] Univ Southern Calif, Keck Sch Med, Dept Med, Los Angeles, CA 90007 USA