I don't know about this specific issue but what I do know is: You must have confidence in your Doctors. Its one thing to question them and this you should do on a regular basis. However, treatment is much harder if you don't have the utmost confidence in them. We can all second gues soutr treatment decisions but its not good and it can drain you of the energy you need to fight the beast. I say this because I had far more agressive treatment than most with removal of the top portion of my Lung and most of the lymp nodes in the center of my chest. My cancer was completely dead but I and my Onc. choose to go the extra route.
When i start to second guess..I put it right out of my mind. I trust my Doctors with my life and I never let them forget that. I look them right in the eye and tell them: I want you to save my life.