I have never heard of 70 either. I have 50 and 60 for the kids - that's the highest I've seen and that's what I was planning on Dan using when he finally goes outside.

Michelle, CG to husband (45), DX 2/08 Stage IVa Adenocarcinoma Salivary Gland (T2N2bMO)
Parotidectomy & ND 2/08, Tumor margins not clear, 4 of 30 nodes positve for cancer,
TX IMRT 39x, cisplatin 7x (completed 5/1/08),
PEG (4/22 - 7/9), No port. Currently in remission!