title: Acute pain management during facial injection of botulinum toxin: an evidence-based systematic review.
authors.affiliation: Department of Plastic, Reconstructive, and Aesthetic Surgery; Wexham Park Hospital; Berkshire, United Kingdom (Azzopardi) Department of Plastic, Reconstructive and Burns Surgery; Welsh Center for Burns and Plastic Surgery; Morriston Hospital; Swansea, United Kingdom (Whitaker).
authors.forename: Ernest A
authors.initials: EA
authors.lastname: Azzopardi
authors.forename: Iain S
authors.initials: IS
authors.lastname: Whitaker