A genetic diagnostic survey in an institutionalized population of 262 moderately mentally retarded patients: the Borgerstein experience

Abstract
In this paper, the authors report the results of a genetic‐diagnostic survey of 262 instutionalized moderately mentally retarded patients and compare these data with their previous studies of the severely mentally retarded. Special attention is given towards the nosology of X‐linked mental retardation and familial mental retardation in general.