Tirado Otálvaro, Andrés Felipe, and Claudia Marcela Moreno Uribe. “Associated Factors to Low Vaccination Rates in Santa Bárbara (Antioquia) 2005 - 2006”. Medicina UPB, vol. 26, no. 1, June 2007, pp. 33-42, https://revistas.upb.edu.co/index.php/medicina/article/view/2311.