Influence of Roux-en-Y gastric bypass surgery on vitamin C, myeloperoxidase, and oral clinical manifestations: a 2-year follow-up study - Molin Netto, Bárbara Dal; Moreira, Emilia Addison Machado; Patiño, Juliana Sedrez Reis; Benincá, Jucélia Pizzetti; Jordão, Alceu Afonso; Fröde, Tânia Silvia (Nutrition in Clinical Practice, 2012)