CHICAGO- May 12: Dr. Mehmet Oz, Vice-Chair and Professor of Surgery at Columbia University, New York Times best-selling author and Daytime Emmy award-winning host of “The Dr. Oz Show,” participated in a one-night-only panel discussion, A Healthy Chicago, at the Murphy Auditorium on May 12,2011. This program is sponsored by PNC Bank and presented by the Chicago Tribune’s Chicago Forward and Tribnation. Prior to the show he signed copies of his books for fans.(Photo credit mandatory Linda Matlow)