Relative Frequency of the Hurler and Hunter Syndromes

Abstract
To the Editor: Dr. McKusick's interesting and provocative article1 prompted us to look at the data concerning these syndromes in the British Columbia Registry for Handicapped Children and Adults. The Registry has been described before,2 but for those unfamiliar with its workings, it might be appropriate to point out that it has multiple sources of ascertainment, including discharge diagnoses from all inpatients in the hospitals in British Columbia, children's outpatient clinics, public-health units, residential institutions for the mentally retarded, the physician's notice of birth, private physicians and special treatment centers. All the mucopolysaccharide disorders are classified under Item 273.8 in . . .

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