Improvement of Platysma Prominence With OnabotulinumtoxinA: Safety and Efficacy Results From a Randomized, Double-Blinded, Placebo-Controlled Phase 3 Trial

These supplementary materials provide additional data supporting the main manuscript (OnabotA for Platysma Prominence Phase 3[309]) on the safety and efficacy of onabotulinumtoxinA for improving platysma prominence. They consist of a plain language summary, tables detailing the number of injections and total doses administered, participant demographics, baseline characteristics, efficacy results in the modified intent-to-treat population, and treatment-related adverse events in the safety population. Diagrams illustrating injection sites and participant flow in the study are also included.