Mary Hägg, Speech and Swallowing Centre, Department of Otorhinolaryngology, Hudiksvall Hospital, Hudiksvall, SE 82481, Sweden
Mary Hägg, Centre for Research and Development, Uppsala University/County Council of Gävleborg, Gävle, SE 80188, Sweden
Lita Tibbling, Thomas Franzén, Department of Surgery and Department of Clinical and Experimental Medicine, Linköping University, Linköping, SE 58185, Sweden
Author contributions: Hägg M, Tibbling L and Franzén T contributed equally to this work; Hägg M and Franzén T designed the study and performed the research; Hägg M and Tibbling L participated in the conception, analysis and interpretation of data, and drafted the article; Franzén T participated in the analysis of the high-resolution manometry readings and drafted this section of the manuscript; all the authors revised the manuscript for final submission.
Supported by Centre for Research and Development, Uppsala University/County Council of Gävleborg, Gävle, Sweden, and the Council for Regional Research in Uppsala and Örebro, Sweden.
Ethics approval: The patients in this study who were referred to a swallowing center, as part of an otorhinologic department for the investigation and treatment of dysphagia, were examined on a regular basis and were therefore not subject to any ethical consideration.
Informed consent: The twelve patients referred to an esophageal laboratory provided informed consent to receive IQS traction in addition to standard esophageal examination.
Conflict-of-interest: IQoroR is patented and CE-marked by MYoroface AB. Mary Hägg is the inventor. Swedish patent SE 1350314-9, 2014 July 14. IQoroR is an orofacial medical device and a method for therapeutic use. The authors declare that they have no conflict of interest.
Data sharing: The presented data (anonymized and without risk of identification) were shared between the three authors.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Mary Hägg, DDS, PhD, Speech and Swallowing Centre, Department of Otorhinolaryngology, Hudiksvall Hospital, Hudiksvall, SE 82481, Sweden. firstname.lastname@example.org
Telephone: +46-650-92754 Fax: +46-65-92412
Received: November 21, 2014
Peer-review started: November 22, 2014
First decision: December 11, 2014
Revised: January 17, 2015
Accepted: February 11, 2015
Article in press: February 11, 2015
Published online: June 28, 2015