1. Faculty of Medicine, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil;
2. Hospital Universitário Evangélico de Curitiba, Faculty of Medicine FEPAR, Curitiba, Brazil;
3. Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil;
4. North Wing Regional Hospital, Brasilia, Brazil;
5. Pontifícia Universidade Católica do Paraná, Curitiba, Brazil;
6. Reference Center for Cutaneous Phototherapy and Photobiology, Belo Horizonte, Brazil;
7. Department of Dermatology, Pará State University, Belém, Brazil;
8. Faculty of Medicine, University of ABC, Santo André, Brazil;
9. University Hospital Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;
10. Hospital das Clínicas da Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;
11. Santa Casa de São Paulo, São Paulo, Brazil;
12. Hospital das Clínicas, Federal University of Bahia, Salvador, Brazil;
13. Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;
14. State College of Medicine of São José do Rio Preto, São José do Rio Preto, Brazil;
15. University Hospital of Brasília, Brasília, Brazil;
16. Department of Dermatology, São Paulo State University, Botucatu, Brazil;
17. Goiânia General Hospital, Goiânia, Brazil;
18. Department of Dermatology, Celso Pierro Hospital and Maternity Hospital at PUC Campinas, Campinas, Brazil;
19. Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil;
20. Campinas State University, Campinas, Brazil;
21. Pedro Ernesto University Hospital of the State University of Rio de Janeiro, Rio de Janeiro, Brazil;
22. Janssen-Cilag Farmacêutica Ltda, São Paulo, Brazil, for the APPISOT study (Avaliação da gravidade da psoríase em placas em brasileiros em acompanhamento ambulatorial: estudo multicêntrico, observacional e transversal [Evaluation of the severity of plaque psoriasis in Brazilians in outpatient follow-up: a multicenter, observational and cross-sectional study])