A Study With Pentasa in Patients With Active Crohn's Disease

San Diego Clinical Trials, San Diego

Clinical Research of West Florida, Clearwater

Atlanta Gastroenterology Specialists, John's Creek

Center for Digestive and Liver Disease, Inc, Mexico

Wake Research Associates, Raleigh

Consultants for Clinical Research Inc., Cincinnati

Hartwell Research Group, LLC, Anderson

CHC Saint Joseph, Liège

Herlev University Hospital, Copenhagen

Investigational Site, Lille

Investigational Site, Berlin

Internist Gastroenterologie, Evangelisches Krankenhaus Kalk Akad. Lehrkrankenhaus für die Universität Köln, Cologne

Gemeinschaftspraxis, Leipzig

Lunds Lasaret, Lund

Addenbrookes Hospital, Cambridge