Use of refractometry and colorimetry as field methods to rapidly assess antimalarial drug quality (vol 43, pg 105, 2007) - Green, MD; Nettey, H; Rojas, O; Pamanivong, C; Khounsaknalath, L; Ortiz, MG; Newton, P; Fernandez, F; Vongsack, L; Manolin, O (2007)