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Spontaneous singleton and twin pregnancy in two patients wi..:

Demissie Yared ; Fiad Tarek ; Klemm Katja...
http://www.saudiannals.net/article.asp?issn=0256-4947;year=2006;volume=26;issue=4;spage=296;epage=299;aulast=Demissie.  , 2006