A recent open access publication co-authored by Chris Evans details the multi-year effort to develop and validate the Dysphagia Symptom Questionnaire (DSQ) to support labeling claims in accordance with FDA guidelines: Hudgens, S, Evans C, Philips E, Hill M. Psychometric validation of the Dysphagia Symptom Questionnaire in patients with eosinophilic esophagitis treated with budesonide oral suspension. Journal of Patient Reported Outcomes (2017) 1:3 DOI 10.1186/s41687-017-0006-5.