(a) VDZ TLs at week 2 according to wash-out periods. Median VDZ
TLs at 22.8 µg/ml (IQR (17.1–33.2), n = 25) and
26.9 µg/ml (IQR (20.2–32.8), n = 29) for
wash-out period <6 weeks and >6 weeks, respectively. (b)
Residual IFX TLs at third infusion of VDZ (week 6) according to
wash-out periods. Median residual IFX TL at 0.5 µg/ml (IQR
(0–1.5), n = 19) and 0 µg/ml (IQR (0–0.5)
n = 19) for wash-out period <6 weeks and
>6 weeks, respectively. IFX: infliximab/CT-P13; IQR:
interquartile range; TL: trough level; VDZ: vedolizumab; WO:
wash-out.