permitted to review the medical records running for president in 2008 and a practicing neuro surgeon and deal with patients with these types of cancer. this is such a difficult decision and such a difficult conversation to have for the patient and the family about when is it time to stop treatment and so much of this goes back to quality of life, sanjay. >> yeah. there's no question about it. i think in some of these conversations happened almost since the time of diagnosis, erica. that is diagnosis for senator mccain in july of last year, 13 months now since he was diagnosed. he had an operation, you remember, because there was a blood collection just above his eyebrow on the left eyebrow and they weren't sure what caused that blood collection. when they removed it, that's when they found the tumor. but really, at that time, you know, you sort of -- once you have the diagnosis, you say here's the various options, the likelihood of them having a significant impact and constantly weighing risks and benefits and i think when's