Orvik, E., Johansen, O., Gullestad, L., & Birkeland, K. (2006). Health-related quality of life in patients with type 2 diabetes compared to their spouses: Sub-study of the Asker and Baerum Cardiovascular Diabetes Study. International Diabetes Nursing, 3(1), 21–26. https://doi.org/10.1002/edn.35