M. V. V. Zuben, S. F. Derchain, L. O. Sarian, M. C. Westin, L. C. S. Thuler, and L. C. Zeferino, “The impact of a community intervention to improve cervical cancer screening uptake in the Amazon region of Brazil”, Sao Paulo Med J, vol. 125, no. 1, pp. 42–45, Jan. 2007.