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The practice of intensive care nurses using the closed suct..:

Somayeh Haghighat ; AhmadReza Yazdannik
http://www.ijnmrjournal.net/article.asp?issn=1735-9066;year=2015;volume=20;issue=5;spage=619;epage=625;aulast=Haghighat.  , 2015