Validating a measure of myalgic encephalomyelitis/chronic fatigue syndrome symptomatology Abigail A. Brown & Leonard A. Jason Fatigue: Biomedicine, Health & Behavior: Vol. 2, Iss. 3, 2014 Published online: 23 Jul 2014 http://www.tandfonline.com/doi/full/10.1080/21641846.2014.928014#.U9E8mvldWSo This paper works towards validating the DePaul Symptom Questionnaire. Unfortunately the full paper isn't available for free.