How would you reconcile EQD2 calculation for organs at risk in patients receiving BID fractionation to the chest after an initial course of daily conventional fractionation?

There is a paper regarding time-based corrections to BED for hyperfractionation in such a scenario. You end up multiplying the usual result by a time factor that increases the BED above the usual daily fraction result. I don't have the reference handy but it is out there. Maybe someone else on this ...