Fig. 3. Erythema values 24 h after irradiation and treatment of test
areas with different substances. a Untreated. b Placebo gel. c A.
vera gel (97.5%). d 1% hydrocortisone in placebo gel. e Dermallerg-Ratiopharm
1% cream. f Dermatop cream. * p ! 0.05: significant
difference compared to untreated area.