Gil, F., M. Rato, A. Monteiro, J. Parente, C. Martins, J. Aranha, and M. J. Silva. “Why Do We Discontinue Biologic Agents? A Retrospective Study of 11 Years”. Journal of the Portuguese Society of Dermatology and Venereology, Vol. 78, no. 2, July 2020, pp. 123-8, doi:10.29021/spdv.78.2.1175.