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In our opinion these factors are more reliable than the data hitherto available because they are based on a considerably larger series.<\/jats:p>","DOI":"10.1136\/jmg.22.5.350","type":"journal-article","created":{"date-parts":[[2008,11,10]],"date-time":"2008-11-10T15:09:16Z","timestamp":1226329756000},"page":"350-353","source":"Crossref","is-referenced-by-count":16,"title":["Chronic proximal spinal muscular atrophy of childhood and adolescence: problems of classification and genetic counselling."],"prefix":"10.1136","volume":"22","author":[{"given":"I","family":"Hausmanowa-Petrusewicz","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J","family":"Zaremba","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J","family":"Borkowska","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1985,10,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"447","DOI":"10.1136\/jmg.21.6.447","article-title":"Chronic proximal spinal muscular atrophy of childhood and adolescence: sex influence","volume":"21","author":"Hausmanowa-Petrusewicz, I.; Zaremba, J.; Borkowska, J.; Szirkowiec, W.","year":"1984","unstructured":"Hausmanowa-Petrusewicz I, Zaremba J, Borkowska J, Szirkowiec W. 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