G. N. Tytgat · 4 obras en el catálogoObrasPProcedures in HepatogastroenterologyProcedures in HepatogastroenterologyHHelicobactor PyloriHelicobactor PyloriIIs Crohn's Disease a Mycobacterial Disease?Is Crohn's Disease a Mycobacterial Disease?UUpdate Gastroenterology 2003Update Gastroenterology 2003