Plasmodium knowlesi malaria an emerging public health problem in Hulu Selangor, Selangor, Malaysia (2009–2013): epidemiologic and entomologic analysis by Vythilingam, I., Lim, Yvonne Ai Lian, Venugopalan, B., Ngui, Romano, Leong, C.S., Wong, M.L., Khaw, L.T., Goh, X.T., Yap, N.J., Wan Yusoff, W.S., Jeffery, J., Zawiah, A.G.C.T., Aszlina, I.N., Sharma, R.S.K., Ling, L.Y., Mahmud, Rohela