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Abstract
Published research studies have described the existence of 5 glabellar contraction
patterns. Botulinum toxin A (BoNTA) has been an approved and effective treatment of
glabellar lines.
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*Laser Department of Dermatology, Phi-skin Clinic, Shanghai, China; †Department of
Dermatology, Shanghai Gleneagles Medical and Surgical Center, Parkway Health, Shanghai,
China; ‡Department of Dermatology, Huashan Hospital affiliated to Fudan University,
Shanghai, China.