Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
Systematic review	People with psoriasis (severity not reported), number of people in analysis not reported 9 RCTs in this analysis	Local adverse effects with vitamin D derivatives with dithranol short-contact therapy	ARI 27% 95% CI 17% to 36%	Effect size not calculated	vitamin D derivatives