Study	Reason for exclusion
Diamond 1998	Excluded, as trial intervention was a solution ‐ not a barrier
Dunn 2002	Excluded, as trial intervention was a solution ‐ not a barrier
Korrell 1998	Excluded, as trial intervention was a solution ‐ not a barrier
Korrell 2000a	Excluded, as trial intervention was a solution ‐ not a barrier
Korrell 2000b	Excluded, as trial intervention was a solution ‐ not a barrier
Liu 2015	Excluded as trial intervention was a solution ‐ not a barrier
Reid 1993	Not an intervention that was sought by the objectives of the review
Reid 1997	Not an intervention that was sought by the objectives of the review
To 1992	Excluded, as no outcomes of interest to this review (fever and need for antibiotics)
Trew 2016	Excluded, as trial intervention was a solution ‐ not a barrier