Study	Reason for exclusion
ACTRN12614000465651	Authors contacted on 30 May 2019, with no response
Day 2012	Clinical response and remission rates not reported according to treatment arm. Authors contacted on 2 June 2019, with initial response but none thereafter
NCT00367705	Authors contacted on 30 May 2019, without response
NCT00374374	Authors contacted on 31 May 2019, without response
NCT01548014	Authors contacted on 15 June 2019, without response
Plein 1993	All patients received probiotics during the induction phase
Su 2018	Probiotic arm received corticosteroids, which the control arm did not receive
Ye 2017	Outcomes were not divided according to IBD type: CD and UC
Yılmaz 2019	Study criteria included patients with active and quiescent CD

CD: Crohn's disease
IBD: inflammatory bowel disease
UC: ulcerative colitis