The Efficacy of Functional Electrical Stimulation of the Abdominal Muscles in the Treatment of Chronic Constipation in Patients with Multiple Sclerosis: A Pilot Study. Singleton C, Bakheit A M, Peace C Mult Scler Int. 2016; 2016:4860315. Epub 2016 Apr 20. PMID: 27200190. Abstract CommentRecommendBookmarkWatch