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. 2022 Dec 15;315(5):1249–1255. doi: 10.1007/s00403-022-02511-3

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Fig. 1 — 30 years old male patient had atrophic acne scar showed excellent improvement after treatment with PRF. Right side treated by combined fluid PRF with needling (a, before treatment), (b, after treatment). Left side of face treated by intradermal injection of PRF only (c, before treatment) (d, after treatment)