What no one has talked about is the human side o the equation! The Dr’s can only do what they do best. Once they set the program in motion the player has to follow the rules to the tee. These are highly fine tuned athletes who has always trained and pushed their bodies past its limits. Sometimes they do not follow the directions for whatever reasons and you get set backs. We do not know if it’s the athletes or Dr’s who is wrong but with so many success rates I would tend to think some athletes my not follow orders.