Personal, relational and school factors associated with involvement in fights with weapons among school-age youth in Brazil: a multilevel ecological approach - Peres, Maria Fernanda Tourinho; Azeredo, Catarina Machado; Rezende, Leandro Fornias Machado de; Zucchi, Eliana Miura; França Junior, Ivan; Luiz, Olinda do Carmo; Levy, Renata Bertazzi (International journal of public health, 2018)