Daytime sleepiness versus fatigue in patients with multiple sclerosis: A systematic review on the Epworth sleepiness scale as an assessment tool. Popp RFJ, Fierlbeck AK, Knüttel H, König N, Rupprecht R, Weissert R, Wetter TC Sleep Med Rev. 2016 Mar 18. PMID: 27107751. Abstract CommentRecommendBookmarkWatch