Funding for this research was provided by:
Research and Development Primary Health Care, Region Västra Götaland, Gothenburg, Sweden (-)
Received: 17 April 2020
Accepted: 6 September 2020
First Online: 15 September 2020
Ethics approval and consent to participate
: This study was approved by the Regional Ethical Review Board in Gothenburg, Sweden (Dnr. 529-09). All patients were informed and approved the possibility to receive treatment with PAP and to be included in the study, both through written information received in the waiting room and orally by their caregiver.
: Not required.
: None declared.