Ask HN - How to research a stem cell doctor

A good friend of mine has a child that was born with ONH. As a result he is blind. The family traveled to China a couple of years ago for stem cell treatment and the result were measurable, but didn't really change his quality of life.

They're now considering going to Southern California to work with A Dr David Steenblock

I've exercised all of the google-fu I have in order to try and research the guy. I've found a quackalert page excoriating the guy and a lot of self-referential sites raising him up. I'd really like to help my friend out and either give him a thumbs up or thumbs down as to the guys quackery.

people in my buddy's situation are in a really tough spot. The USDA and AMA move so slowly, and are so politically driven that good medicine is often the third or fourth priority. So what I'm asking for is if any of you guys or girls know of a resource I could use to get vetted, or reputable information regarding his patients, their outcomes and any complaints against him.

It is pretty rare to find a situation where most all of the critiques and all of the praise are self-referential. Any help would be appreciated.