I've been to a spine doctor who has a teaching position at a medical school, and when I asked about ADR he told me that 'you're not a car, you can't go around putting in spare parts, you know'. When I pointed out that they do knee and hip replacement, he said that they 'have had some success with that, I suppose'
He knew nothing about it, and told me it was the most ludicrous thing he ever heard of.
So yes, we often know more than these high priced 'experts'. Sometimes it doesn't take much.........
Sorry for the sarcasm...I'm having a rough day, red tape wise.