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1 Concurrence of Ring 21 and Trisomy 21 in Children of Normal Parents
Yong-Gon Cho, Tae-Won Park, Chang-Seop Lee, Sam-Im Choi
Yonsei Med J.2005;46(2):284-288.   Published online 2005 April 30     DOI: http://dx.doi.org/10.3349/ymj.2005.46.2.284
      

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