Analysis of the evolution and determinants of income-related inequalities in the Brazilian health system, 1998-2008 - Almeida, Gisele; Sarti, Flávia Mori; Ferreira, Fernando Fagundes; Diaz, Maria Dolores Montoya; Campino, Antonio Carlos Coelho (Revista Panamericana de Salud Publica = Pan American Journal of Public Health, 2013)