Correction to: socioeconomic inequalities in survival of children with acute lymphoblastic leukemia insured by social security in Mexico: a study of the 2007-2009 cohorts. - Castro-Ríos, Angélica; Reyes-Morales, Hortensia; Pelcastre-Villafuerte, Blanca E.; Rendón-Macías, Mario E.; Fajardo-Gutiérrez, Arturo (International Journal for Equity in Health, 2019)