Wålinder Olov, Bergström Ingmar, Boethius Göran, and Ugander Lars. 1986. “Studies of Drug-Treated Diabetes in the County of Jämtland, Sweden, Based on Prescription of Insulin and Oral Antidiabetic Drugs”. Upsala Journal of Medical Sciences 91 (1):89-98. https://doi.org/10.3109/03009738609178494.