• Validation of the multiple sclerosis diagnosis in the Norwegian Patient Registry 

      Benjaminsen, Espen; Myhr, Kjell-Morten; Grytten, Nina; Alstadhaug, Karl Bjørnar (Peer reviewed; Journal article, 2019-11-13)
      Background: Health registries may yield important data for epidemiological studies. However, in order to be a valuable source for information, the registered data have to be correct. Objectives: The aim of the study was ...