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1. Safety and efficacy of hyaluronic acid injectable filler in the treatment of nasolabial fold wrinkle: a randomized, double-blind, self-controlled clinical trial
   J Dermatolog Treat (2023) — DOI: 10.1080/09546634.2023.2190829 — PMID: 37694979

   Randomized double-blind self-controlled multicenter trial in Chinese and Taiwanese subjects: the hyaluronic acid filler significantly reduced nasolabial fold wrinkles with no serious adverse events, supporting safety and efficacy in Asian skin.

2. A randomized, multicenter study on a flexible hyaluronic acid filler in treatment of moderate-to-severe nasolabial folds in a Chinese population
   J Cosmet Dermatol (2022) — DOI: 10.1111/jocd.14914 — PMID: 35279948

   Randomized multicenter trial in Chinese patients showing a flexible hyaluronic acid filler effectively corrected moderate-to-severe nasolabial folds with sustained improvement and a good safety profile for facial contouring in Asian skin.

3. Efficacy and safety of a new hyaluronic acid dermal filler in the treatment of severe nasolabial lines
   J Cosmet Dermatol (2011) — DOI: 10.1111/j.1473-2165.2011.00550.x — PMID: 21649813

   Randomized evaluator-blinded intra-individual comparison of a hyaluronic acid filler for severe nasolabial lines; six-month interim results demonstrated effective wrinkle correction with good tolerability.