Sorry to hear man, my mother died from cancer so I know how it feels. But sorry to say I dont know anything about that, or if there has ever been any actual research. I dont think a message board is a good place to look, try searching on google for articles from universities (if research has ever been done regaurding that). I say this because it sounds your time is valuable and you need to get the CORRECT true info, the hard facts the first time around.