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Kim M, Learman L, Nada N, Thompson K. The prevalence of peptic ulcer in an institution for the mentally retarded. J Ment Defic Res. 1981 Jun;25(Pt 2):105-11

Kim M, Learman L, Nada N, Thompson K. The prevalence of peptic ulcer in an institution for the mentally retarded. J Ment Defic Res. 1981 Jun;25(Pt 2):105-11