Donaldson 1966.

Methods	Randomised controlled trial
Participants	I: ‐ myringoplasty (different types)
Interventions	(1) sulfamethoxazole + polymyxin B ‐ neomycin ‐ hydrocortisone impregnated sponge (2) polymyxin B ‐ neomycin ‐ hydrocortisone impregnated sponge
Outcomes	‐ Postoperative infection after 10 days ‐ Postoperative infection after 6 weeks ‐ Adverse effects of antibiotics ‐ Closure of tympanic membrane
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear