Search set	CIDG SRa	CENTRAL	MEDLINEb	Embaseb	LILACSb
1	smectite	Smectite [Supplementary concept]	Smectite [Supplementary concept]	Smectite ti, ab	smectite
2	diosmectite	smectite* ti, ab	smectite* ti, ab	Diosmectite ti, ab	diosmectite
3	1 or 2	Diosmectite ti, ab	Diosmectite ti, ab	1 or 2	1 or 2
4	–	"smecta"[Supplementary Concept]	"smecta"[Supplementary Concept]	Limit 3 to human	‐
5	‐	1 or 2 or 3 or 4	1 or 2 or 3 or 4	‐	‐
6	‐	Limit 5 to humans	Limit 5 to humans	‐	‐
aCochrane Infectious Diseases Group Specialized Register. bSearch terms used in combination with the search strategy for retrieving trials developed by The Cochrane Collaboration (Lefebvre 2011); upper case: MeSH or EMTREE heading; lower case: free text term.