Reliability and Validity of the Swedish Version of the Hull Airway Reflux Questionnaire (HARQ-S).

"Conflict of interest The authors declare no conflicts of interest."

"We thank Professor Alyn Morice, University of Hull, UK, for his generosity in sharing the HARQ with us, and for supporting the development of the Swedish version, and Professor Steven Nordin, University of Umeå, for help with methodological questions. We are grateful to the clinical staff at the Department of Asthma and Allergology at the Sahlgrenska University Hospital for excellent help with the data collection. Many thanks to Anders Pehrsson and Nils-Gunnar Pehrsson, Statistiska Konsultgruppen, Gothenburg, Sweden, for their excellent statistical expertise, and Professor Eva Millqvist for valuable discussions. This study was approved by grants from the Local Health Care Authority of Gothenburg and South Bohuslän, and the Swedish Heart and Lung Foundation."