Address correspondence to Dr Francis O. Walker, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC 27157, [email protected].
Relationship Disclosure: Dr Walker serves on the editorial boards of the Journal of Clinical Neurophysiology and Muscle & Nerve and has received personal compensation for speaking engagements for Grifols. Dr Walker has received research/grant support from CHDI, Pfizer Inc, Teva Pharmaceutical Industries Ltd, and Vaccinex Inc and receives publishing royalties from Elsevier and UpToDate, Inc. Dr Walker has provided expert legal testimony on botulinum toxin indications.
Unlabeled Use of Products/Investigational Use Disclosure: Dr Walker reports no disclosure.
Supplemental digital content: Videos accompanying this article are cited in the text as Supplemental Digital Content. Videos may be accessed by clicking on links provided in the HTML, PDF, and app versions of this article; the URLs are provided in the print version. Video legends begin on page 1291.