Duarte, B., Serrão, V., Rocha Páris, F., Marques Pinto, G., Apetato, M. and Cabete, J. (2019) “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(1), pp. 33-38. doi: 10.29021/spdv.77.1.1004.