Tan, Sukmawati Tansil, et al. “The Effectiveness of Combination Therapy of Needling and Secretome from Mesenchymal Stem Cells (Serum 10%) for Acne Scar Treatment”. Bioscientia Medicina : Journal of Biomedicine and Translational Research, vol. 7, no. 6, July 2023, pp. 3377-83, https://doi.org/10.37275/bsm.v7i6.832.