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acid reflux, anatomical, anatomy, art, artistic, background, biology, cartoon, causes, clip, clip art, clipart, design, diagram, digestive system, disease, drawing, eps10, esophagus, gastroesophageal, gerd, graphic, health, healthy, heartburn, illustration, image, medical, medicine, microbiology, pathology, physiological, physiology, picture, reflux, science, stomach, symptoms, treatment,