|
The authors observed 23 cases of mentally retarded children of Pusan Welfare and Rehabilitation school. In this study, we obtained following results. 1. The etiological study was obscure in disease entity but the main headings were undetermined etiology, infections, suspicious mongolism and accidents. 2.The undetermined group showed most serious mental retardation compare to the group of other etiological factors. 3. The results... |