Online Appendices
- Appendix 1: Study protocol
- Appendix 2: Sub-group analysis
- Appendix 3: OMQ14 individual item responses at baseline and 3 months by group.
- Appendix 4: Supplementary analysis Meta-analysis of tympanogram improvement from B to C1 or A at 1 month (ear-based analysis). Relative risks are adjusted for correlation between ears.