Increasing prevalence of wildtypes in the dihydrofolate reductase gene of Plasmodium falciparum in an area with high levels of sulfadoxine/pyrimethamine resistance after introduction of treated bed nets. - Alifrangis M; Lemnge MM; Rønn AM; Segeja MD; Magesa SM; Khalil IF; Bygbjerg IC (The American journal of tropical medicine and hygiene, 2003)