{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,2,23]],"date-time":"2024-02-23T11:52:12Z","timestamp":1708689132346},"reference-count":27,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2005,6,3]],"date-time":"2005-06-03T00:00:00Z","timestamp":1117756800000},"content-version":"vor","delay-in-days":8189,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am. J. Med. Genet."],"published-print":{"date-parts":[[1983,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The birth prevalence of CNS malformations in the region of Krakow from 1979 to 1981 was determined to be 1.26\/1000 from records of all live\u2010 and still\u2010birth deliveries. The frequency of anencephaly was 0.23\/1,000; spina bifida and encephalocele, 0.70\/1000; isolated hydrocephaly, 0.26\/1,000; and other CNS anomalies, 0.06\/1,000. The observed rates are below the median European level.<\/jats:p><jats:p>Female preponderance was found among the probands with anencephaly, encephalomeningocele, and myelomeningocele.<\/jats:p><jats:p>Cytogenetic examination of 35 newborns with CNS malformations documented normal karyotypes in all neonates.<\/jats:p><jats:p>The analysis of seasonal distribution of proband's birthdate and of date of mother's last menstrual period showed no significant seasonal trend.<\/jats:p>","DOI":"10.1002\/ajmg.1320140124","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T15:34:20Z","timestamp":1118504060000},"page":"181-188","source":"Crossref","is-referenced-by-count":8,"title":["CNS malformations in the krak\u00f3w region. I. Birth prevalence and seasonal incidence during 1979\u20131981"],"prefix":"10.1002","volume":"14","author":[{"given":"Jacek J.","family":"Pietrzyk","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan","family":"Grochowski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Barbara","family":"Ka\u0144ska","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John M.","family":"Opitz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,6,3]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/jmg.10.3.209"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(69)90522-5"},{"key":"e_1_2_1_4_1","first-page":"737","article-title":"L'anenc\u00e9phalie. 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