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Identical dilatation of the sarcoplasmic reticulum was found in the clinically unaffected father of the affected and unaffected grandchildren of the propositus. This raises the possibility that this non-consanguineous member contributed to the genetic trait or its manifestations in the grandchildren of the index patient since similar dilatation of the sarcoplasmic reticulum was not observed in the muscles of healthy control subjects.<\/jats:p>","DOI":"10.1136\/jmg.12.1.20","type":"journal-article","created":{"date-parts":[[2008,11,10]],"date-time":"2008-11-10T14:50:51Z","timestamp":1226328651000},"page":"20-28","source":"Crossref","is-referenced-by-count":6,"title":["Clinical and ultrastructural observations in a kindred with normo-hyperkalaemic periodic paralysis."],"prefix":"10.1136","volume":"12","author":[{"given":"T S","family":"Danowski","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E R","family":"Fisher","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C","family":"Vidalon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J W","family":"Vester","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R","family":"Thompson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S","family":"Nolan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T","family":"Stephan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J H","family":"Sunder","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1975,3,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"455","DOI":"10.7326\/0003-4819-57-3-455","article-title":"Hyperkalemic familial periodic paralysis (adynamia episodica hereditaria)","volume":"57","author":"Armstrong, F.S.","year":"1962","unstructured":"Armstrong, F. 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