Ask-the-Doc: Q & A with Dr. Peter Green of the Celiac Disease Center at Columbia University By Tiffany Janes, Delight Contributor  var addthis_config = {"data_track_addressbar":true}; For over ten years, the Celiac Disease Center at Columbia University has been on the forefront of celiac disease research in the U.S. The director of the Center and Professor of Clinical Medicine, Peter H.