As mentioned, I know of Dr. Dong Moon Shin through my own research, and have not gone there as I'm in NYC, and was treated there. I have read a number of years ago about his research into chemoprevention since I had a number of recurrences, and was interested. Two that I recall were Green Tea and Erlotinib (Tarceva). My oncologist looked into Tarceva, and said it wasn't for me. After I was treated at another cancer center by a different Oncologist, I asked again about Tarceva in chemoprevention, and was told that Tarceva was found not to work, at least in that. That was about 4 years ago, so things could have changed, different dosages, combinations, and heard of other ideas in chemoprevention, but haven't looked into it in a while.
Here is an article on Tarceva in chemoprevention, which was disappointing.
http://www.medscape.com/viewarticle/853961I hope this helps.