Is there any utility for proton beam radiation to replace whole abdominal radiation for patients with Wilms tumor?

It is important to clarify that “whole abdominal radiation” (aka whole abdominal irradiation, or WAI) is a field of radiation therapy (RT) used to treat some Wilms tumor patients. Proton beam RT is a modality of RT delivery, with the main alternative being photon RT. But both photon (more commonly u...