Toledo Gutiérrez, María Isabel, Ana María Alarcón Muñoz, Luis Bustos Medina, Felipe Heusser Risopatrón, Eduardo Hebel Weiss, Pedro Lorca Osorio, María Elisa Castillo Niño, and Francisco Garay Greve. 2009. “Contribution of Qualitative Methods in the Validity of an Instrument Which Measures Quality of Life Related to Health in Children Suffering from a Chronic Illness”. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research 10 (2). https://doi.org/10.17169/fqs-10.2.1311.