Evaluation of the bioavailability of major withanolides of Withania somnifera using an in vitro absorption model system oleh Santosh T Devkar, Amit D Kandhare, Brian D Sloley, Suresh D Jagtap, James Lin, Yun K Tam, Surendra S Katyare, Subhash L Bodhankar, Mahabaleshwar V Hegde