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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Keratinising metaplasia of salivary glands results due to deficiency of
assistant
The correct answer is  Vitamin A deficiency produces keratinizing metaplasia of the normally columnar ductal epithelium in the major and minor salivary glands.
Ref : Handbook of Experimental  Stomatology,edited by Samuel Dreizen, Barnet M. Levy.