eMedicine - Gastritis and Peptic Ulcer Disease: Dr. Philip Shayne describes causes, symptoms, and common treatments.eMedicine: Chronic Gastritis: Review a physician's report on the symptoms, such as stomach pain, nausea, vomiting, anorexia, and weight loss. Learn the causes including gastroesophageal reflux disease (GERD), infection, diet, and alcohol abuse.Mayo Clinic: Hiatal Hernia: A description of the disease plus complications, risk factors, diagnosis, and treatment.MindXpansion: Informative site about gastritis, what it is, the symptoms, causes, causes and prevention.The Pyloric Sphincteric Cylinder in Health and Disease: A full medical textbook on the stomach and pylorus, with topics on their physiology, anatomy and various pathologies.