placebo-controlled trial. Eur J Pain. 2011; 15: 942-9.
23.- Meeus M, et al. Does acetaminophen activate endogenous pain inhibition in chronic fatigue syndrome / fibromyalgia and rheumatoid arthritis? A doble – blind randomized controlled cross – over trial. Pain Physician. 2013; 16: 61 – 70.
24.- Goldenberg DL, et al. A model to assess severity and impact of fibromyalgia. I Reumatol 1995; 22: 2213 – 8.
25.- Kashikar – Zuck S, et al. Changes in pain coping, catastrophizing, and coping efficacy after cognitive – behavioral therapy in children and adolescents with juvenile fibromyalgia. J Pain. 2013
26.- Köller V, et al. Phychotherapy for patients with fibromyalgia syndrome. Systematic review, meta – analysis and guideline. Schmerz. 2012; 26: 291 – 6.
27.- Fiedberg F, et al. Lifestyle – oriented non – pharmacological treatments for fibromyalgia: a clinical overview and applications with home – based technologies. J Pain Res. 2012; 5: 425 – 35.
28.- Offenbächer M, et al. Physical therapy in the treatment of fibromyalgia. Scand J Rheumatol Suppl. 2000; 113: 78 – 85.
29.- Carbonario F, et al. Effectiveness of high – frequency transcutaneous electrical nerve stimulation at tender points as adjuvant therapy for patients with fibromyalgia. Eur J Phys Rehabil Med. 2013. EPub.
30.- Moretti FA, et al. Combined therapy (ultrasound and interferential current) in patients with fibromyalgia: once or twice in a week. Physiother Res Int. 2012; 17: 142 – 9.
31.- Kesiktas N, et al. The efficacy of balneotherapy and physical modalities on the pulmonary system of patients with fibromyalgia. J Back Muskuloskelet Rehabil. 2011; 24: 57 – 65.
32.- Winkelmann A, et al. Physiotherapy and physical therapies for fibromyalgia syndrome. Systematic review, meta – analysis and guideline. Schmerz. 2012; 26: 276 – 286.
33.- Moldofsky H, et al. Induction of neurasthenic musculoskeletal pain syndrome by selective sleep stage deprivation. Phychosom Med 1976; 38: 35 – 44.