Quantitative determination of donepezil in human plasma by liquid chromatography/tandem mass spectrometry employing an automated liquid-liquid extraction based on 96-well format plates. Application to a bioequivalence study - Apostolou, C.; Dotsikas, Y.; Kousoulos, C.; Loukas, Y.L. (Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences, 2007)