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Comparative study of intrathecal hyperbaric versus isobaric..:

Rajni Gupta ; Jaishri Bogra ; Prithvi Kumar Singh...
http://www.saudija.org/article.asp?issn=1658-354X;year=2013;volume=7;issue=3;spage=249;epage=253;aulast=Gupta.  , 2013