I am currently being scheduled for a second opinion regarding an ACDF or ADR at C 6&7. Can anyone assist me with a web site to research a doctor's credentials in California. I know that the ADR is pretty new within the US and I am leaning towards it for surgery but I want to be sure. I just want to be more comfortable with the new Surgeon. I would like to know just how good they are and if there were any negatives towards them. Can any one help me out. Thank you for your time.