Karoglan, Ante, Bernhard Paetzold, Joao Pereira De Lima, Holger Brüggemann, Thomas Tüting, Denny Schanze, Marc Güell, and Harald Gollnick. 2019. “Safety and Efficacy of Topically Applied Selected Cutibacterium Acnes Strains over Five Weeks in Patients With Acne Vulgaris: An Open-Label, Pilot Study”. Acta Dermato-Venereologica 99 (13):1253-57. https://doi.org/10.2340/00015555-3323.