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22. Early prediction of mental retardation using the developmental milestones of sitting, standing, and walking. Tenbrinck MS. J Am Med Womens Assoc (1972); 1974 Feb; 29(2):72-5. PubMed ID: 4130041 [No Abstract] [Full Text] [Related]
31. Clinical characteristics of children with mental retardation of unknown etiology in Korea. Yim SY, Lee IY. J Korean Med Sci; 1999 Apr; 14(2):128-32. PubMed ID: 10331556 [Abstract] [Full Text] [Related]