Dworzack 1988.

Methods	Double‐blind, ITT
Participants	Volunteers
Interventions	Ciprofloxacin 1 x 750 mg versus placebo
Outcomes	Eradication, resistance developed, adverse effects Follow‐up: 21 days
Notes	Main serogroups: B, Z
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Unclear
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Double‐blind
Incomplete outcome data (attrition bias) All outcomes	Low risk	ITT
Selective reporting (reporting bias)	Low risk	No evidence
Other bias	Low risk	No evidence