title: Adverse reactions to tretinoin and collagen injections.
authors.forename: M L
authors.initials: ML
authors.lastname: Elson
mesh_terms: D003094:Collagen / Q000008:administration & dosage / Q000009:adverse effects*; D004890:Erythema / Q000209:etiology*; D006801:Humans; D007279:Injections, Subcutaneous; D014212:Tretinoin / Q000009:adverse effects*
chemical_list: D014212:Tretinoin; D003094:Collagen