@inbook{1190669120, author={Paula Purpera and Leslie S. Baumann}, editor={Baumann, Leslie S. and Rieder, Evan A. and Sun, Mary D.}, title={Botulinum Toxins}, booktitle={Baumann’s Cosmetic Dermatology, 3e}, publisher={McGraw Hill LLC}, address={New York, NY}, year={2022}, url={dermatology.mhmedical.com/content.aspx?aid=1190669120} }