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The cases are presented in order to discuss the phenotypic limits of the FG syndrome and to consider the need to separate other distinct but similar entities.<\/jats:p>","DOI":"10.1136\/jmg.26.6.373","type":"journal-article","created":{"date-parts":[[2008,11,10]],"date-time":"2008-11-10T15:11:11Z","timestamp":1226329871000},"page":"373-378","source":"Crossref","is-referenced-by-count":8,"title":["X linked mental retardation: a family with a separate syndrome?"],"prefix":"10.1136","volume":"26","author":[{"given":"E M","family":"Thompson","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Gordon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M","family":"Baraitser","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1989,6,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1002\/ajmg.1320280202","article-title":"X-linked mental retardation with Marfanoid habitus","volume":"28","author":"Fryns, J.P.; Buttiens, M.","year":"1987","unstructured":"Fryns JP, Buttiens M. 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