Conflict of interest: F. Gagnadoux reports consultancy fees from Air Liquide Sante, Asten Sante, Inspire Medical, Resmed and Sefam, payment or honoraria for lectures, presentations, manuscript writing or educational events from Inspire Medical, Philips Respironics, Resmed and Sefam, and support for attending meetings from Asten Sante, Resmed and Sefam. S. Bailly has no potential conflicts of interest to disclose. R.J. Schwab reports grants from NIH, CryOSA and Inspire, royalties or licences from UpToDate and Merck Manual, consultancy fees and support for attending meetings from Eli Lilly, and participation on a data safety monitoring board or advisory board with eXciteOSA and Sleep Evolution.