This is an especially interesting subject to me because I'm a malignant melanoma survivor from a decade ago and I wrote a booklet about how I survived before these treatments were available,
I found European clinical studies which showed that Vitamin D-3 more than doubled the survival rate.
There is also considerable evidence that the spice turmeric - often found in curry, also improves your chances of survival.
Since neither of these would in any way interfere with more recent treatments I suggest patients read the scientific results I cite in my book and consider adding Vitamin D-3 and or turmeric to their diets.
My book is the lowest price I could set, 99-cents and Amazon Prime members can read it for free.