How, if at all, has the new DAHANCA H&N contouring guidelines changed how you delineate low dose CTV (CTV-P2) for head and neck cancer primaries?

I think it is important to keep anatomical boundaries for head and neck cancer. To depart from that is problematic for the primary disease site. My subclinical region always takes into account the anatomical likely site of spread. The 5 by 5 rule that the consensus guideline referenced is an old sch...