Is there a consensus on when the clock starts on the 1 year, etc. periods - do they start at the time of diagnosis or the end-of-treatment?

Seems like I've seen it both ways.

Thanks in advance,

Chris

SCC left tonsil, 2 lymph nodes, modified radical neck dissection, IMRT (both sides) completed 10/25/06, Erbitux and Cisplatin weekly, Ethyol daily