A validation study of an esophageal probe-based polygraph against polysomnography in obstructive sleep apnea.

"Declarations Ethical approvalThis project was in accordance with the standards of, and approved by, the Regional Ethical Committee of South Eastern Norway (#2013/2294, https://helseforskning.etikkom.no) and is registered in the Current Research Information System in Norway (#545380, https://www.cristin.no/english/). All procedures performed in this study were in accordance with the Helsinki declaration of 1964 and its later amendments. Informed consentInformed consent was obtained from all subjects participating in this study. Conflict of interestThe authors declare no competing interests. Conflict of interest The authors declare no competing interests."

"Funding Open access funding provided by Akershus University Hospital (AHUS). The project was partially funded by a governmental official research grant from Innovation Norway (Innovasjon Norge, grant no. 2919019) and was partially funded by an official research grant contract between Akershus University Hospital and Spiro Medical."

"Declarations: Ethical approvalThis project was in accordance with the standards of, and approved by, the Regional Ethical Committee of South Eastern Norway (#2013/2294, https://helseforskning.etikkom.no) and is registered in the Current Research Information System in Norway (#545380, https://www.cristin.no/english/). All procedures performed in this study were in accordance with the Helsinki declaration of 1964 and its later amendments.: Informed consentInformed consent was obtained from all subjects participating in this study.: Conflict of interestThe authors declare no competing interests. Ethical approval: This project was in accordance with the standards of, and approved by, the Regional Ethical Committee of South Eastern Norway (#2013/2294, https://helseforskning.etikkom.no) and is registered in the Current Research Information System in Norway (#545380, https://www.cristin.no/english/). All procedures performed in this study were in accordance with the Helsinki declaration of 1964 and its later amendments."