Erratum to “Absorption, liver first-pass effect, pharmacokinetics and tissue distribution of calycosin-7- O -ß- d -glucopyranoside (C7G) and its major active metabolite, calycosin, following oral administration of C7G in rats by LC–MS/MS” [J. Pharm. Biomed. Anal. 148 (2018) 350–354]