Would you treat patient with early stage unfavorable classic Hodgkin lymphoma with 6 cycles instead of 4 cycles of Nivo-AVD to avoid mediastinal radiation in young female?

I would tailor the number of cycles to the clearance of PET positivity. If one is considering stopping at 4 cycles, I would do a PET scan after 2 cycles and only stop at 4 if it was negative. If it is positive after 2 cycles, I would repeat the PET scan after 4 cycles. If it is still positive, an al...