− | Keratoconjunctivitis (dry eye), ulcers of the eye, difficulty swallowing, [[stomatitis]], [[gingivitis]] and [[glossitis]] are all possible clinical signs. | + | Keratoconjunctivitis (dry eye), ulcers of the eye, difficulty swallowing, [[stomatitis]], [[Periodontal Disease|gingivitis]] and [[glossitis]] are all possible clinical signs. |