- Impact of permethrin-treated bed nets on the incidence of sick child visits to peripheral health facilities. Phillips-Howard, P.A., Nahlen, B.L., Wannemuehler, K.A., Kolczak, M.S., ter Kuile, F.O., Gimnig, J.E., Olson, K., Alaii, J.A., Odhacha, A., Vulule, J.M., Hawley, W.A. Am. J. Trop. Med. Hyg. (2003)