Goino, I would need to be at home to look at the articles again to be one hundred percent sure about this but there were two giant studies, published in 2004 in the New England Journal of Medicine, one done in Europe and one in the States, that established that 10-15% effectiveness number. They also looked at outcomes for distant metastasis and I believe they did not find any differentce in that outcome based on whether the patient had received concurrent chemo or not.

It's been a while since I read these articels and I could be recalling wrong--I'm willing to stand corrected by anyone who has either article at hand. Even if I am recalling correctly, all the qualifications go along with this that should go with any null result--perhaps they didn't have enough statistical power to detect an effect there, etc.

Nelie