Nutritional selenium status and its relevance to glutatione peroxidase activity in patients with rheumatoid arthritis - Callou, Kátia Rau de Almeida; Silva, Graziela Biude; Pollak, Daniel Feldman; Pimentel, José Alexandre Coelho; Cozzolino, Silvia Maria Franciscato (Congress of the Federation of European Societies on Trace Elements and Minerals (FESTEM), 2013)