Frequency of the Prader-Willi syndrome in the San-in district, Japan.


Nineteen cases of the Prader-Willi syndrome were collected in the San-in district, in the western part of Japan, and an epidemiological study was carried out. The male to female ratio was 1:1.11. Deletion of chromosome 15q11-13 was found in seven of 16 patients examined by means of high-resolution chromosome banding. The incidence among live-births was… (More)


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