Hester 1998.

Methods	Randomised controlled trial
Participants	I: ‐ tympanoplasty ‐ tympanomastoidectomy ‐ radical mastoidectomy
Interventions	(1) ampicillin/sulbactam/Augmentin or cefazolin/cephalexin or erythromycin or clindamycin + bacitracin gauze + neomycin ‐ polymyxin ‐ hydrocortisone drops (2) bacitracin gauze + neomycin ‐ polymyxin ‐ hydrocortisone drops
Outcomes	‐ Postoperative infection within 3 weeks ‐ Graft failure within 3 weeks ‐ Graft failure after 3 months
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear