Aum 2006.

Study characteristics
Methods	This study was carried out in a secondary care setting. The blinding within this study was unclear. Intention‐to‐treat analysis was not carried out. This study was conducted in Korea.
Participants	24 participants were recruited. Inclusion criteria of the trial Adults and children Refractory warts Periungual warts
Interventions	Intralesional bleomycin (dose unclear) versus Pulsed dye laser with intralesional bleomycin every 3 weeks. The total duration of therapy was unclear.
Outcomes	Outcomes of the trial Cure rate
Notes	Follow‐up time was unclear. Recurrence was assessed at 6 months.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	This was described as randomised; the method of randomisation was not clear.
Allocation concealment (selection bias)	Unclear risk	It was unclear if allocation was concealed; no information was given in the trial report.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	It was unclear if the study was blinded. Comment: Blinding was unlikely given the nature of the treatment.
Blinding of outcome assessment (detection bias) All outcomes	High risk	It was unclear if the study was blinded.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No participants were apparently lost to follow up, but the numbers completing and available for assessment were not given. Comment: The minimisation of attrition bias was adequate.
Selective reporting (reporting bias)	High risk	The length of the study was not documented. Tolerability, adverse effects, and practicality of PDL were not reported on.