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Summary of content validation methodology. Focus interview transcripts of pediatric patients with EoE and their parents were used to develop the items and domains for the PEESS™ v2.0. Cognitive interviewing was conducted with separate cohorts of pediatric patients and their parents in the 8-12 and 13-18 year old age groups, while parent proxy-reports were also obtained in the 2-4 year old and 5-7 year old age groups.
