Polymorphisms of the SERPINA1 gene are associated with higher mortality in a Brazilian cohort of ANCA-associated vasculitis patients Henrique Ayres Mayrink Giardini; Valeria de Falco Caparbo; Isac de Castro; Andréia Padilha Toledo; Carmen Silvia Valente Barbas; Samuel Katsuyuki Shinjo; Rosa Maria Rodrigues Pereira;