M.E. Ukhun, S.B. Tobi and N.P. Okolie
Journal of Medical Sciences 5 ( 4 ): 260 - 265 , 2005
F.I. Obahiagbon, P. Oviasogie, M.E. Ukhun and P.N. Oviawe
Trends in Applied Sciences Research 2 ( 3 ): 260 - 263 , 2007