mehmet found himself at the center of a firestorm last week when 10 prominent doctors sent a letter to columbia university , where he serves as vice chairman and professor of surgery at college of physicians , calling for his resignation because he is a ` charlatan who promotes ` quack treatments .
' in a special episode of the dr oz show , which was pre-taped tuesday and will air thursday , the beleaguered physician directly addressed his attackers and accused them of trying to bully him into silence .
the show released a 25-second teaser clip to cnn money featuring a part of oz 's rebuttal to promote the upcoming episode .