G. N. J. Tytgat

• Annual of gastrointestinal endoscopy
• Controversies in Gastrointestinal Diseases
• Gastroenterological endoscopy
• Gastrointestinal and liver tumors
• Grading and Staging in Gastroenterology
• Helicobacter pylori
• Helicobacter pylori
• Helicobacter pylori
• Helicobacter pylori
• Helicobacter pylori
• Inflammatory Bowel Diseases
• Is Crohn's disease a mycobacterial disease?