Inclusion Criteria:  - Completion of all phases of the lead-in Phase 3 study (Screening Period, Treatment Period [randomization/treatment with 4-month follow-up visit] and Study Exit visit)  Exclusion Criteria:  Any medical condition that may put the participant at increased medical risk with exposure to BOTOX, including diagnosed myasthenia gravis, Eaton-Lambert syndrome, amyotrophic lateral sclerosis, or any other condition that might interfere with neuromuscular function Participant has an anticipated need for treatment with botulinum toxin of any serotype for any indication during the study (other than study intervention) Anticipated need for surgery or overnight hospitalization during the study Females who are pregnant or breastfeeding and are considering becoming pregnant or donating eggs during the study Known immunization or hypersensitivity to any botulinum toxin serotype History of clinically significant (per investigator's judgment) drug or alcohol abuse within the last 6 months Lower facial and neck hair, scarring (e.g., acne), or other abnormal variations that may interfere with photography (such that photograph is not acceptable) Tattoos, jewelry, or clothing that cannot be removed, and that obscure the target area of interest