Resistance to cosmetic botulinum toxin A: A 15-patient case series across 12 sites - Carlos G. Wambier, MD, PhD; Fatima N. Mirza, MD, MPH; Sarah P.F. Wambier, MD, PhD; Vince Bertucci, MD; Jean Carruthers, MD; Joely Kaufman, MD; John Martin, MD; J. Barton Sterling, MD; Flávia Brasileiro, MD; Carolina Marçon, MD, MSc; Allison J. Brown, MD; Miranda Rosenberg, MD; et al. (Elsevier, 2025)