A Novel Regenerative Approach for Acne Vulgaris Using Combined Umbilical Cord Mesenchymal Stem Cell-Derived Secretome and Platelet-Rich Plasma: A Case Report. CBS Int. Journal [Internet]. 2025 Oct. 13 [cited 2026 Nov. 8];4(11):359-66. Available from: https://journal.apu.ac.id/cbs/article/view/71