What is the longest treatment break you would allow during definitive HN RT +/- chemo?

Continuing therapy after a break depends on several factors. The timing of the break is important: Little repopulation occurs in the first 3-4 weeks of standard RT, and then it quickly accelerates, with a loss in local control rates of of 14%, 26%, and 35% after 1,2 and 3 week breaks respectively (W...