This blinded controlled 2-year study on 120 patients with 2 or more actinic keratoses, compare the efficacy and tolerability of pulsed dye-laser- mediated photodynamic therapy compared to conventional photodynamic therapy and fractional-laser assisted daylight photodynamic therapy compared to daylight photodynamic therapy.
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Patient complete (%, P) or partial clearance (%, P)
Timeframe: 2 year
Lesion-specific clearance (%, P)
Timeframe: 2 year