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Low flow anesthesia: Efficacy and outcome of laryngeal mask..:

El-Seify Zeinab ; Khattab Ahmed ; Shaaban Ashraf..
http://www.saudija.org/article.asp?issn=1658-354X;year=2010;volume=4;issue=1;spage=6;epage=10;aulast=El-Seify.  , 2010