Artemther-lumefantrine is partially effective for treating chronic multi-species malaria in Ugandan pre-school children by Betson Martha, Sousa-Figueiredo José C, Clifford Sarah, Atuhaire Aaron, Arinaitwe Moses, Adriko Moses, Mwesigwa Gerald, Nabonge Juma, Kabatereine Narcis B, Sutherland Colin J, Stothard J