Gadomski 1994a ‐ oral.

Methods	See Gadomski 1994a ‐ neb
Participants
Interventions
Outcomes
Notes	Oral treatment group: in order to represent the results from the 2 bronchodilator treatment arms (nebulized and oral), this study is listed twice. Each treatment group had its own placebo group
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk
Allocation concealment (selection bias)	Low risk
Blinding (performance bias and detection bias) All outcomes	Low risk
Incomplete outcome data (attrition bias) All outcomes	Low risk
Selective reporting (reporting bias)	Low risk