Long-lasting insecticidal nets provide protection against malaria for only a single year in Burundi, an African highland setting with marked malaria seasonality by Van Bortel, W, Mariën, J, Jacobs, BKM, Sinzinkayo, D, Sinarinzi, P, Lampaert, E, D'hondt, R, Mafuko, J-M, De Weggheleire, A, Vogt, F, Alexander, N, Wint, W, Maes, P, Vanlerberghe, V, Leclair, C