1. Department of Genetics, Federal University of Pernambuco, Recife, Brazil;
2. Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, Brazil;
3. Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;
4. Division of Rheumatology, Clinical Hospital, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;
5. Rheumatology Service, Clinical Hospital, Federal University of Alagoas, Maceió, Brazil;
6. Rheumatology Division, Clinical Hospital, Federal University of Pernambuco, Recife, Brazil;
7. Department of Medicine, Clinical Immunology Division, Medicine Faculty of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil;
8. Institute for Maternal, Child Health “Burlo Garofolo,” Trieste, Italy