{"groups":[{"description":"Active high frequency TENS will be used visit 1 Washout 6 days Placebo for visit 2- 7 days after visit 1 Washout for 6 days No tens visit 3- 7 days after visit 2","id":"FG000","title":"Order: Active, Placebo, No TENS"},{"description":"Placebo low frequency TENS will be used visit 1 Washout 6 days Active high intensity TENS for visit 2- 7 days after visit 1 Washout for 6 days No tens visit 3- 7 days after visit 2","id":"FG001","title":"Order: Placebo, Active, No TENS"},{"description":"No TENS will be used visit 1 Washout 6 days Active high intensity TENS for visit 2- 7 days after visit 1 Washout for 6 days Placebo Low Intensity TENS visit 3- 7 days after visit 2","id":"FG002","title":"Order: No TENS, Active, Placebo"}],"periods":[{"milestones":[{"achievements":[{"groupId":"FG000","numSubjects":"14"},{"groupId":"FG001","numSubjects":"14"},{"groupId":"FG002","numSubjects":"13"}],"type":"STARTED"},{"achievements":[{"groupId":"FG000","numSubjects":"14"},{"groupId":"FG001","numSubjects":"14"},{"groupId":"FG002","numSubjects":"13"}],"type":"COMPLETED"},{"achievements":[{"groupId":"FG000","numSubjects":"0"},{"groupId":"FG001","numSubjects":"0"},{"groupId":"FG002","numSubjects":"0"}],"type":"NOT COMPLETED"}],"title":"Overall Study"}],"preAssignmentDetails":"Study exclusion criteria were (1) TENS use within 5 years, (2) conditions precluding TENS use (pacemaker, nickel allergy), (3) pain intensity less than 1 of 10 with rest or swallowing, (4) sensory impairment (could not identify sharp and dull stimuli on face), and/or (5) inability to read, write, or follow directions.","recruitmentDetails":"This prospective, randomized, double-blinded, and placebo controlled study was conducted between May 2011 and August 2012 at the University of Iowa Hospitals and Clinics (Clinical-Trials.gov identifier, NCT01194466)"}