Epidemiology of rare diseases in Brazil: protocol of the Brazilian Rare Diseases Network (RARAS-BRDN) - Félix, Têmis Maria; Oliveira, Bibiana Mello de; Artifon, Milena; Carvalho, Isabelle; Bernardi, Filipe Andrade; Schwartz, Ida Vanessa Doederlein; Saute, Jonas A.; Ferraz, Victor Evangelista de Faria; Acosta, Angelina Xavier; Sorte, Ney Boa; Alves, Domingos; Sarti, Flávia Mori (Orphanet Journal of Rare Diseases, 2022)