O C Ekwueme ; U E Ezeoke ; U Mgbeokwere http://www.ijmhdev.com/article.asp?issn=2635-3695;year=2009;volume=14;issue=2;spage=22;epage=28;aulast=Ekwueme;type=0.
,
2009
F N Chukwuneke ; L O Okoye ; U Mgbeokwere... http://www.ijmhdev.com/article.asp?issn=2635-3695;year=2007;volume=12;issue=2;spage=56;epage=60;aulast=Chukwuneke;type=0.
,
2007