A group of ten top doctors want Columbia University to boot TV celebrity Dr. Mehmet Oz from its faculty for his "repeatedly shown disdain of science and for evidence-based medicine."

ozDr. Henry Miller of Stanford University's Hoover Institution wrote the letter that attacked Oz's "baseless and relentless opposition to the genetic engineering of food crops."

Oz, a cardiovascular and thoracic surgeon, is vice chair of Columbia's College of Physicians and Surgeons.

His syndicated TV program, "The Dr. Oz Show," has been criticized for promoting questionable products and making unsubstantiated claims.

During a Senate hearing last summer, Oz defended his program, saying it gives hope to people and provides information about alternative treatments.

The Manhattan-based Ivy League school has defended Oz's right to freedom of expression

Backing Oz, Columbia issued a statement to say it "is committed to the principle of academic freedom and to upholding faculty members' freedom of expression for statements they make in public discussion."

Oz's TV career took off after his appearances on "Oprah."