1.Lerdal A, Celius EG, Krupp L, Dahl AA: A prospective study of patterns of fatigue in multiple sclerosis. Eur J Neurol 2007, 14:1338–1343.
2.Minden SL, Frankel D, Hadden L, Perloffp J, Srinath KP, Hoaglin DC: The Sonya Slifka Longitudinal Multiple Sclerosis Study: methods and sample characteristics. Mult Scler 2006, 12:24–38.
3.Weiland TJ, Jelinek GA, Marck CH, Hadgkiss EJ, van der Meer DM, Pereira NG, Taylor KL: Clinically significant fatigue: prevalence and associated factors in an international sample of adults with multiple sclerosis recruited via the internet. PLoS One 2015, 10:e0115541.
4.Kister I, Bacon TE, Chamot E, Salter AR, Cutter GR, Kalina JT, Herbert J: Natural history of multiple sclerosis symptoms. Int J MS Care 2013, 15:146–158.
5.Fisk JD, Pontefract A, Ritvo PG, Archibald CJ, Murray TJ: The impact of fatigue on patients with multiple sclerosis. Can J Neurol Sci 1994, 21:9–14.
6.van Kessel K, Moss-Morris R: Understanding multiple sclerosis fatigue: a synthesis of biological and psychological factors. J Psychosom Res 2006, 61:583–585.
7.van den Akker LE, Beckerman H, Collette EH, Knoop H, Bleijenberg G, Twisk JW, Dekker J, de Groot V, group T-As: Cognitive behavioural therapy for MS-related fatigue explained: A longitudinal mediation analysis. J Psychosom Res 2018, 106:13–24.
8.van Kessel K, Moss-Morris R, Willoughby E, Chalder T, Johnson MH, Robinson E: A randomized controlled trial of cognitive behavior therapy for multiple sclerosis fatigue. Psychosom Med 2008, 70:205–213.
9.Asano M, Finlayson ML: Meta-analysis of three different types of fatigue management interventions for people with multiple sclerosis: exercise, education, and medication. Mult Scler Int 2014, 2014:798285.
10.Brenner P, Piehl F: Fatigue and depression in multiple sclerosis: pharmacological and non-pharmacological interventions. Acta Neurol Scand 2016, 134 Suppl 200:47–54.
11.Kos D, Duportail M, D’Hooghe M, Nagels G, Kerckhofs E: Multidisciplinary fatigue management programme in multiple sclerosis: a randomized clinical trial. Mult Scler 2007, 13:996–1003.
12.Rietberg MB, van Wegen EE, Eyssen IC, Kwakkel G, group MSs: Effects of multidisciplinary rehabilitation on chronic fatigue in multiple sclerosis: a randomized controlled trial. PLoS One 2014, 9:e107710.
13.Beckerman H, Blikman LJ, Heine M, Malekzadeh A, Teunissen CE, Bussmann JB, Kwakkel G, van Meeteren J, de Groot V, group T-As: The effectiveness of aerobic training, cognitive behavioural therapy, and energy conservation management in treating MS-related fatigue: the design of the TREFAMS-ACE programme. Trials 2013, 14:250.
14.Blikman LJ, van Meeteren J, Twisk JW, de Laat FA, de Groot V, Beckerman H, Stam HJ, Bussmann JB, group T-As: Effectiveness of energy conservation management on fatigue and participation in multiple sclerosis: A randomized controlled trial. Mult Scler 2017, 23:1527–1541.
15.Heine M, Verschuren O, Hoogervorst EL, van Munster E, Hacking HG, Visser-Meily A, Twisk JW, Beckerman H, de Groot V, Kwakkel G, group T-As: Does aerobic training alleviate fatigue and improve societal participation in patients with multiple sclerosis? A randomized controlled trial. Mult Scler 2017, 23:1517–1526.
16.van den Akker LE, Beckerman H, Collette EH, Twisk JW, Bleijenberg G, Dekker J, Knoop H, de Groot V, Group T-AS: Cognitive behavioral therapy positively affects fatigue in patients with multiple sclerosis: Results of a randomized controlled trial. Mult Scler 2017, 23:1542–1553.
17.Moss-Morris R, McCrone P, Yardley L, van Kessel K, Wills G, Dennison L: A pilot randomised controlled trial of an Internet-based cognitive behavioural therapy self-management programme (MS Invigor8) for multiple sclerosis fatigue. Behav Res Ther 2012, 50:415–421.
18.Pöttgen J, Moss-Morris R, Wendebourg JM, Feddersen L, Lau S, Kopke S, Meyer B, Friede T, Penner IK, Heesen C, Gold SM: Randomised controlled trial of a self-guided online fatigue intervention in multiple sclerosis. J Neurol Neurosurg Psychiatry 2018, 89:970–976.
19.Thomas S, Thomas PW, Kersten P, Jones R, Green C, Nock A, Slingsby V, Smith AD, Baker R, Galvin KT, Hillier C: A pragmatic parallel arm multi-centre randomised controlled trial to assess the effectiveness and cost-effectiveness of a group-based fatigue management programme (FACETS) for people with multiple sclerosis. J Neurol Neurosurg Psychiatry 2013, 84:1092–1099.
20.van den Akker LE, Beckerman H, Collette EH, Eijssen IC, Dekker J, de Groot V: Effectiveness of cognitive behavioral therapy for the treatment of fatigue in patients with multiple sclerosis: A systematic review and meta-analysis. J Psychosom Res 2016, 90:33–42.
21.van Kessel K, Wouldes T, Moss-Morris R: A New Zealand pilot randomized controlled trial of a web-based interactive self-management programme (MSInvigor8) with and without email support for the treatment of multiple sclerosis fatigue. Clin Rehabil 2016, 30:454–462.
22.Menting J, Tack CJ, van Bon AC, Jansen HJ, van den Bergh JP, Mol M, Goedendorp MM, Donders R, Knoop H: Web-based cognitive behavioural therapy blended with face-to-face sessions for chronic fatigue in type 1 diabetes: a multicentre randomised controlled trial. Lancet Diabetes Endocrinol 2017, 5:448–456.
23.Abrahams HJG, Gielissen MFM, Donders RRT, Goedendorp MM, van der Wouw AJ, Verhagen C, Knoop H: The efficacy of Internet-based cognitive behavioral therapy for severely fatigued survivors of breast cancer compared with care as usual: A randomized controlled trial. Cancer 2017, 123:3825–3834.
24.Janse A, Worm-Smeitink M, Bleijenberg G, Donders R, Knoop H: Efficacy of web-based cognitive-behavioural therapy for chronic fatigue syndrome: randomised controlled trial. Br J Psychiatry 2018, 212:112–118.
25.Food and Drugs Administration: Guidance for industry: non-inferiority clinical trials. US Department of Health and Human Services and US Food and Drug Administration, Washington, DC 2010.
26.Piaggio G, Elbourne DR, Pocock SJ, Evans SJ, Altman DG, Group C: Reporting of noninferiority and equivalence randomized trials: extension of the CONSORT 2010 statement. JAMA 2012, 308:2594–2604.
27.Tummers M, Knoop H, Bleijenberg G: Effectiveness of stepped care for chronic fatigue syndrome: a randomized noninferiority trial. J Consult Clin Psychol 2010, 78:724–731.
28.van der Ploeg E, Mooren TT, Kleber RJ, van der Velden PG, Brom D: Construct validation of the Dutch version of the impact of event scale. Psychol Assess 2004, 16:16–26.
29.Evers AW, Kraaimaat FW, van Lankveld W, Jongen PJ, Jacobs JW, Bijlsma JW: Beyond unfavorable thinking: the illness cognition questionnaire for chronic diseases. J Consult Clin Psychol 2001, 69:1026–1036.
30.Dennison L, Moss-Morris R, Silber E, Galea I, Chalder T: Cognitive and behavioural correlates of different domains of psychological adjustment in early-stage multiple sclerosis. J Psychosom Res 2010, 69:353–361.
31.Knoop H, van Kessel K, Moss-Morris R: Which cognitions and behaviours mediate the positive effect of cognitive behavioural therapy on fatigue in patients with multiple sclerosis? Psychol Med 2012, 42:205–213.
32.Beck AT, Guth D, Steer RA, Ball R: Screening for major depression disorders in medical inpatients with the Beck Depression Inventory for Primary Care. Behav Res Ther 1997, 35:785–791.
33.Herschbach P, Berg P, Dankert A, Duran G, Engst-Hastreiter U, Waadt S, Keller M, Ukat R, Henrich G: Fear of progression in chronic diseases: psychometric properties of the Fear of Progression Questionnaire. J Psychosom Res 2005, 58:505–511.
34.Kwakkenbos L, van den Hoogen FH, Custers J, Prins J, Vonk MC, van Lankveld WG, Becker ES, van den Ende CH: Validity of the Fear of Progression Questionnaire-Short Form in patients with systemic sclerosis. Arthritis Care Res (Hoboken) 2012, 64:930–934.
35.Prins JB, Bleijenberg G, Bazelmans E, Elving LD, de Boo TM, Severens JL, van der Wilt GJ, Spinhoven P, van der Meer JW: Cognitive behaviour therapy for chronic fatigue syndrome: a multicentre randomised controlled trial. Lancet 2001, 357:841–847.
36.Jacobsen PB, Andrykowski MA, Thors CL: Relationship of catastrophizing to fatigue among women receiving treatment for breast cancer. J Consult Clin Psychol 2004, 72:355–361.
37.Ray C, Weir W, Stewart D, Miller P, Hyde G: Ways of coping with chronic fatigue syndrome: development of an illness management questionnaire. Soc Sci Med 1993, 37:385–391.
38.van Sonderen E: Sociale Steun Lijst–Interacties (SSL-I) en Sociale Steun Lijst-Discrepanties (SSL-D). 1993.
39.Sullivan MJ, Bishop SR, Pivik J: The pain catastrophizing scale: development and validation. Psychological assessment 1995, 7:524.
40.Bergner M, Bobbitt RA, Carter WB, Gilson BS: The Sickness Impact Profile: development and final revision of a health status measure. Med Care 1981, 19:787–805.
41.Jacobs HM, Luttik A, Touw-Otten FW, de Melker RA: [The sickness impact profile; results of an evaluation study of the Dutch version]. Ned Tijdschr Geneeskd 1990, 134:1950–1954.
42.Skerrett TN, Moss-Morris R: Fatigue and social impairment in multiple sclerosis: the role of patients’ cognitive and behavioral responses to their symptoms. J Psychosom Res 2006, 61:587–593.
43.Strober LB, Arnett PA: An examination of four models predicting fatigue in multiple sclerosis. Arch Clin Neuropsychol 2005, 20:631–646.
44.Aaronson NK, Muller M, Cohen PD, Essink-Bot ML, Fekkes M, Sanderman R, Sprangers MA, te Velde A, Verrips E: Translation, validation, and norming of the Dutch language version of the SF–36 Health Survey in community and chronic disease populations. J Clin Epidemiol 1998, 51:1055–1068.
45.Vercoulen JH, Bazelmans E, Swanink CM, Fennis JF, Galama JM, Jongen PJ, Hommes O, Van der Meer JW, Bleijenberg G: Physical activity in chronic fatigue syndrome: assessment and its role in fatigue. J Psychiatr Res 1997, 31:661–673.
46.Vercoulen J, Alberts M, Bleijenberg G: De checklist individuele spankracht (CIS). Gedragstherapie 1999, 32:6.
47.Worm-Smeitink M, Gielissen M, Bloot L, van Laarhoven HWM, van Engelen BGM, van Riel P, Bleijenberg G, Nikolaus S, Knoop H: The assessment of fatigue: Psychometric qualities and norms for the Checklist individual strength. J Psychosom Res 2017, 98:40–46.
48.Krupp LB, LaRocca NG, Muir-Nash J, Steinberg AD: The fatigue severity scale. Application to patients with multiple sclerosis and systemic lupus erythematosus. Arch Neurol 1989, 46:1121–1123.
49.Cook KF, Bamer AM, Roddey TS, Kraft GH, Kim J, Amtmann D: A PROMIS fatigue short form for use by individuals who have multiple sclerosis. Qual Life Res 2012, 21:1021–1030.
50.Thandi G, Fear NT, Chalder T: A comparison of the Work and Social Adjustment Scale (WSAS) across different patient populations using Rasch analysis and exploratory factor analysis. J Psychosom Res 2017, 92:45–48.
51.Meyer-Moock S, Feng YS, Maeurer M, Dippel FW, Kohlmann T: Systematic literature review and validity evaluation of the Expanded Disability Status Scale (EDSS) and the Multiple Sclerosis Functional Composite (MSFC) in patients with multiple sclerosis. BMC Neurol 2014, 14:58.
52.Parmelee PA, Thuras PD, Katz IR, Lawton MP: Validation of the Cumulative Illness Rating Scale in a geriatric residential population. J Am Geriatr Soc 1995, 43:130–137.
53.Arrindell WA, Ettema J: SCL–90: Handleiding bij een multidimensionele psychopathologie-indicator. Swets test publishers; 1986.
54.Derogatis LR: SCL–90-R: Administration, scoring and procedures manual for the R (evised) version and other instruments of the psychopathology rating scale series. Clinical Psychometric Research; 1992.
55.Johns MW: A new method for measuring daytime sleepiness: the Epworth sleepiness scale. Sleep 1991, 14:540–545.
56.Mollayeva T, Thurairajah P, Burton K, Mollayeva S, Shapiro CM, Colantonio A: The Pittsburgh sleep quality index as a screening tool for sleep dysfunction in clinical and non-clinical samples: A systematic review and meta-analysis. Sleep Med Rev 2016, 25:52–73.
57.Bishop M, Frain MP: The Multiple Sclerosis Self-Management Scale: revision and psychometric analysis. Rehabil Psychol 2011, 56:150–159.
58.Hughes AM, Chalder T, Hirsch CR, Moss-Morris R: An attention and interpretation bias for illness-specific information in chronic fatigue syndrome. Psychol Med 2017, 47:853–865.
59.Heins MJ, Knoop H, Bleijenberg G: The role of the therapeutic relationship in cognitive behaviour therapy for chronic fatigue syndrome. Behav Res Ther 2013, 51:368–376.
60.Hatcher RL, Gillaspy JA: Development and validation of a revised short version of the Working Alliance Inventory. Psychotherapy Research 2006, 16:12–25.
61.Munder T, Wilmers F, Leonhart R, Linster HW, Barth J: Working Alliance Inventory-Short Revised (WAI-SR): psychometric properties in outpatients and inpatients. Clin Psychol Psychother 2010, 17:231–239.
62.Bangor A, Kortum PT, Miller JT: An empirical evaluation of the system usability scale. Intl Journal of Human–Computer Interaction 2008, 24:574–594.
63.Brooke J: SUS-A quick and dirty usability scale. Usability evaluation in industry 189, 194 (1996), 4–7. 1996.
64.Perepletchikova F, Kazdin AE: Treatment integrity and therapeutic change: Issues and research recommendations. Clinical Psychology: Science and Practice 2005, 12:365–383.
65.Di Blasi Z, Harkness E, Ernst E, Georgiou A, Kleijnen J: Influence of context effects on health outcomes: a systematic review. Lancet 2001, 357:757–762.
66.Fuertes JN, Toporovsky A, Reyes M, Osborne JB: The physician-patient working alliance: Theory, research, and future possibilities. Patient Educ Couns 2017, 100:610–615.