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A survey of 557 Korean aesthetic physicians observed common use and usefulness of intradermal PN injections for facial erythema arising from inflammatory dermatosis and recurring laser therapies.膠原蛋白是一種脊椎動物體內含量最豐富的蛋白質，它的基本結構由大約一千個胺基酸組成，而膠原分子則透過互相