Tutt, Alasdair S.
Persson, Hampus
Andersson, Erik P. http://orcid.org/0000-0003-4433-1218
Ainegren, Mats http://orcid.org/0000-0002-8820-1610
Stenfors, Nikolai http://orcid.org/0000-0002-1684-1301
Hanstock, Helen G. http://orcid.org/0000-0002-5381-736X
Funding for this research was provided by:
Hjärt-Lungfonden (20190261)
Region Jämtland Härjedalen (JLL-931753)
Gunhild och Assar Karlssons donationsfond (2019)
Mid Sweden University
Article History
Received: 26 November 2020
Accepted: 16 March 2021
First Online: 29 March 2021
Declarations
:
: After being approached by the authors, Vapro produktutveckling AB supplied the HME masks and filters for use in the study without charge. Otherwise, the authors have no conflicts of interest to declare.
: The study was approved by the Umeå Regional Ethics Review Board (Dnr: 2018-419-31) and conducted in accordance with the Declaration of Helsinki.
: Participants provided written, informed consent to participate in the study.