Invited Discussion on: Hyaluronic Acid Filler in the Treatment of Drooping Tip-Anatomical Concepts and Clinical Results

Affiliations

• ¹ Divisions of Plastic and Reconstructive Surgery, Stanford University, Palo Alto, CA, USA. ronaldpgruber@gmail.com.
• ² Divisions of Plastic and Reconstructive Surgery, University of California (SF), San Francisco, CA, USA. ronaldpgruber@gmail.com.
• ³ Divisions of Plastic and Reconstructive Surgery, University of California (SF), San Francisco, CA, USA.
• ⁴ Divisions of Plastic and Reconstructive Surgery, Stanford University, Palo Alto, CA, USA.