Figure 6From: Patient-recorded outcome to assess therapeutic efficacy in protoporphyria-induced dermal phototoxicity: a proposal Frequency histogram of the effectiveness estimates. The abscissa displays the 101-point estimation scale (0% to 100%), the ordinate the number of estimate per scale point. Ten percent and multiples thereof appear more frequently than 5% estimates. Estimates in between the 5% intervals are missing.Back to article page