Kilsztajn, Samuel, Dorivaldo Francisco da Silva, Marcelo Bozzini da Camara, and Vanessa Setsuko Ferreira. “ Level of Private Health Insurance Coverage and Regional Distribution of Public Health Expenditure ”. Saúde e Sociedade 10, no. 2 (December 1, 2001): 35–46. Accessed July 4, 2024. https://revistas.usp.br/sausoc/article/view/7060.