Toledo Gutiérrez, M. I., A. M. Alarcón Muñoz, L. Bustos Medina, F. Heusser Risopatrón, E. Hebel Weiss, P. Lorca Osorio, M. E. Castillo Niño, and F. Garay Greve. “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, vol. 10, no. 2, May 2009, doi:10.17169/fqs-10.2.1311.