A Randomized Double-blind Vehicle-controlled Parallel-dose Phase II Study Evaluating the Safety and Efficacy of a Recombinant Botulinum Neurotoxin Type A Injection (YY003) for the Treatment of Moderate to Severe Glabellar Lines in Adults
The study is a two-part (Part A and Part B) randomized double-blind vehicle-controlled multi-center study in a total of 174 participants with moderate to severe glabellar lines. The objective of this study is to test the safety, efficacy, immunogenicity of YY003, and compare to vehicel control, in improving the appearance of moderate to severe glabellar lines.