Hörfelt, C Topical methyl aminolaevulinate photodynamic therapy for treatment of facial acne vulgaris: results of a randomized, controlled study. [electronic resource] - The British journal of dermatology Sep 2006 - 608-13 p. digital Publication Type: Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0007-0963 Standard No.: 10.1111/j.1365-2133.2006.07340.x doi Subjects--Topical Terms: Acne Vulgaris--drug therapyAdministration, CutaneousAdolescentAdultAminolevulinic Acid--adverse effectsDouble-Blind MethodFemaleHumansMalePhotochemotherapy--adverse effectsPhotosensitizing Agents--adverse effectsProspective StudiesSeverity of Illness IndexTreatment Outcome