Grønning M, Mellgren S I
Acta Neurol Scand. 1985 Sep;72(3):321-7. doi: 10.1111/j.1600-0404.1985.tb00878.x.
The prevalence of MS in the two northernmost counties of Norway increased from 20.6 per 100,000 in 1973 to 31.5 per 100,000 in 1983, the increase being most marked in women. The average annual incidence seems to have been stable over the past 20-30 years. None of the patients had a pure Lapp background (having a Lapp mother and father).
挪威最北部两个郡的多发性硬化症患病率从1973年的每10万人20.6例增至1983年的每10万人31.5例，这种增长在女性中最为显著。在过去20至30年里，平均年发病率似乎一直稳定。所有患者均无纯正的拉普族血统（父母双方均为拉普族人）。
