Kaldal, Anete
Tonstad, Serena
Jortveit, Jarle
Funding for this research was provided by:
National Association for Public Health, Norway
Sørlandet Hospital HF, Arendal
Article History
Received: 20 July 2021
Accepted: 7 December 2021
First Online: 16 December 2021
Declarations
:
: The study was approved by Regional Committee for Medical and Health Research Ethics (REK, 2.2007.248). All study participants have signed a written consent form. The data collection, storage and processing were approved by Norwegian Social Science Data Services (NSD, 2007/17221). The study is registered in ClinicalTrials.gov (16.05.2008, NCT00679237).
: Not applicable.
: The authors declare no conflicts of interest.