Recommendations on the Development of a Bioanalytical Assay for 4β-Hydroxycholesterol, an Emerging Endogenous Biomarker of CYP3A Activity - Anne-Françoise Aubry; Brian Dean; Ulf Diczfalusy; Angela Goodenough; André Iffland; James McLeod; Naidong Weng; Ziping Yang (The AAPS Journal, 2016)