Twice-a-day radiation more effective with IBC?

Have there been studies that show that twice-a-day radiation is more effective with IBC? Should it be standard protocol for IBC?
At M.D. Anderson, for many years we've been investigating whether giving radiation twice a day instead of once a day leads to an improved outcome. The information we have from our own institutional experience leads us to be optimistic about this approach. The theory behind giving twice-a-day radiation is that you can complete the treatment in a shorter period of time and therefore have less of a chance of the IBC tumor cells growing during the course of treatment. The treatments, however, have some side effects and risks that also need to be considered. In addition, this approach hasn't been thoroughly studied in a big head-to-head comparative trial, in part because IBC is a rare disease. I would hate to say that giving once-a-day radiation is wrong. It remains the most common radiation delivery schedule given in the United States. I do think it is reasonable to consider twice-a-day radiation, given the good results that have been reported by investigators at M.D. Anderson.