1Norwegian Institute Of Public Health, Oslo, Norway
2Western Norway University of Applied Sciences, Bergen, Norway
3Department of Health Sciences Ålesund, Norwegian University of Science and Technology (NTNU), Ålesund, Norway; Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
4Sheffield Centre for Health & Related Research (SCHARR), University of Sheffield, Sheffield, United Kingdom
5School of Medical and Health Sciences, Bangor University, Bangor, United Kingdom
6Public Health Sciences, University of Virginia, Virginia, United States
