Borelli C, Merk K, Schaller M, Jacob K, Vogeser M, Weindl G, et al. In vivo porphyrin production by P. acnes in untreated acne patients and its modulation by acne treatment. Acta Derm Venereol [Internet]. 2006 Jul. 29 [cited 2026 May 13];86(4):316-9. Available from: https://medicaljournalssweden.se/actadv/article/view/8239