Long-term dupilumab treatment for chronic refractory generalized prurigo nodularis: A retrospective cohort study.

Competing Interests: Conflicts of interest Dr Alhusayen has received honoraria from AbbVie, Eli Lilly, Janssen, Leo Pharma, and Novartis. Dr Lansang has been a speaker, consultant, and adviser for Amgen, AbbVie, Celgene, Eli Lilly, Janssen, Leo Pharma, Novartis, and Valeant. Dr Shear has received honoraria from AbbVie, Amgen, Bausch Medical, Celgene, Janssen, Leo Pharma, Eli Lilly, Novartis, Pfizer, Sanofi-Genzyme, and UCB. Dr Yeung has been a speaker, consultant, and investigator for AbbVie, Allergan, Amgen, Astellas, Boehringer Ingelheim, Celgene, Centocor, Coherus, Dermira, Eli Lilly, Forward, Galderma, GSK, Janssen, Leo Pharma, Medimmune, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi-Genzyme, Takeda, UCB, Valeant, and Xenon. Dr Walsh has received honoraria from AbbVie, Eli Lilly, Novartis, Pfizer, and Sanofi-Genzyme. Drs Georgakopoulos, Croitoru, and Felfeli have no conflicts of interest to declare.