I'm currently seeing Dr. David Binion, he works at UPMC presby at the Uni Of Pittsburgh. Theres about
5-6 doctors there, and a couple surgeons that all work together. Best people I've ever met!
"Dr. Binion is an internationally recognized expert on Inflammatory Bowel Disease basic science, translational and clinical investigation. His research has been funded by the National Institutes of Health and the Crohn’s and Colitis Foundation of America. His investigation has centered on the cellular and molecular mechanisms of human IBD, with a specific focus on the microvascular biology of chronic intestinal inflammation. His clinical work has centered on developing novel therapies and algorithms for treatment of patients with severe and refractory IBD."
Thats his profile from the Pitt med website. You can see it here.
http://www.dept-med.pitt.edu/gi/faculty.aspx
Binion and Reguerio are your best bet in my opinion.