Permeation of Boswellia extract in the Caco-2 model and possible interactions of its constituents KBA and AKBA with OATP1B3 and MRP2 - Kruger, P; Kanzer, J; Hummel, J; Fricker, G; Schubert-Zsilavecz, M; Abdel-Tawab, M (Eur J Pharm Sci, 2009)