“…With loss of treatment response estimated as 13% per patient year of IFX therapy [36], children, who inherently have longer treatment duration than patients with adult-onset disease, are at greatest risk for losing biological treatment options, especially when those options are already limited to anti-TNF agents. In the search to enlarge the therapeutic armamentarium, newer biologics, namely vedolizumab (Entyvio, Takeda), ustekinumab (Stelara, Janssen), golimumab (Simponi, Janssen) are off-label used as second-line biologic agents with evidence limited to case reports or small trials in pediatric populations [5,38,39,40].…”