Miranda, Aurea Cristina Portorreal, Rodrigo Strehl Machado, Edina Mariko Koga da Silva, and Elisabete Kawakami. 2010. “Seroprevalence of Helicobacter Pylori Infection Among Children of Low Socioeconomic Level in São Paulo”. São Paulo Medical Journal 128 (4):187-91. https://periodicosapm.emnuvens.com.br/spmj/article/view/1806.