Vitamins and squamous metaplasia.
D000818:Animals; D004848:Epithelium; D004935:Esophageal Diseases / Q000209:etiology; D000882:Haplorhini; D010215:Papio; D012257:Riboflavin Deficiency / Q000150:complications*; D012871:Skin Diseases / Q000209:etiology*