A. Kahwa, G.S. Mfinanga, G.D. Kimaro, B. Mutayoba, E. Ngadaya, G. Mbogo, J.W. Ogondiek, A.M. Mdemu, V.R. Nyigo, L. Lema, S. Kivuyo and G. Mubyazi
Research Journal of Medical Sciences 2 ( 1 ): 33 - 37 , 2008