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Peptic ulcer - Symptoms and causes - Mayo Clinic
Gastrointestinal bleeding - Symptoms and causes - Mayo Clinic
Peptic ulcer - Diagnosis and treatment - Mayo Clinic
Bedsores (pressure ulcers) - Symptoms and causes - Mayo
Helicobacter pylori (H. pylori) infection - Symptoms & causes
Ulcerative colitis - Symptoms and causes - Mayo Clinic
Gastritis - Symptoms and causes - Mayo Clinic
Behcet's disease - Symptoms and causes - Mayo Clinic
Canker sore - Symptoms and causes - Mayo Clinic
Cervicitis - Symptoms and causes - Mayo Clinic