PropionibacteriumPropionibacterium acnesTretinoinAcne VulgarisKeratolytic AgentsLentigoOintmentsAdministration, TopicalSkin AgingCosmeticsDermatologic AgentsChemexfoliationHyperpigmentationAcitretinGram-Positive Bacterial InfectionsMelanosisNicotinic AcidsEmollientsTrichloroacetic AcidKeratosis, ActinicSkin CareFacial InjuriesSkinSebumCarcinoma, Basal CellBenzoyl PeroxideSebaceous GlandsCarboxyl and Carbamoyl TransferasesRetinoidsMethylmalonyl-CoA MutaseAdministration, CutaneousSkin PigmentationDrug CombinationsBacteria, AnaerobicCheeseCorynebacteriumDouble-Blind MethodIsomerasesProsthesis-Related InfectionsAnaerobiosisAcne KeloidPropionibacteriaceaeActinomycetales InfectionsAbscessBacteria, AerobicNaphtholsAntineoplastic AgentsCoproporphyrinsAnti-Bacterial AgentsPeptostreptococcusCobamidesBacteriaTreatment OutcomePerianal GlandsBacteriocinsLactococcusAborted FetusIsotretinoin