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Usefulness of Botulinum Toxin Injection in Rehabilitation of Facial Paralysis: Improving Mouth Angle Asymmetry.
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Chang Kee Hong, Jae Yong Byun, Seung Geun Yeo, Mun Suh Park, Chang Il Cha
Korean J Otorhinolaryngol-Head Neck Surg. 2007;50(12):1087-1091.
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