The highest achievers. But the literature that is given to them is selected. Carefully selected and lots of it. At least that is my belief. I might be wrong.
Some doctors do study also alternative or complimentary medicine.
I personally think they are the best doctors. That's where the medical monopoly plays a role. You will have to read for yourself. Read Murder by Injection and read almost any published book about Vaccinations. There might be one in a hundred of books about Vaccinations that is positive to vaccinations.