NEW YORK (AP) — Vowing that "we will not be silenced," television's Dr. Oz is fighting back against critics who are trying to get him removed from a faculty position at Columbia University.

Dr. Mehmet Oz will air an episode of his syndicated talk show on Thursday that specifically takes on the group of 10 doctors from around the country who wrote to a Columbia dean about him. The group suggested last week that Oz promotes "quack treatments" of weight loss supplements with no scientific proof that they work.

Oz taped a message previewing his show where he said he knows he has alienated people in "our quest to make America healthy."

But he said freedom of speech is a fundamental right of Americans, and the other doctors are trying to silence him.