Duarte, B., V. Serrão, F. Rocha Páris, G. Marques Pinto, M. Apetato, and J. Cabete. “Can Psoralen Ultraviolet-A or Narrowband Ultraviolet-B Salvage the Biologic Drug Response After a Secondary Failure? A Retrospective Cohort Study”. Journal of the Portuguese Society of Dermatology and Venereology 77, no. 1 (March 26, 2019): 33-38. Accessed August 10, 2022. https://revista.spdv.com.pt/index.php/spdv/article/view/1004.