BMC Public Health 2009, 9:140 http://www.biomedcentral.com/1471-2458/9/140 leave: a randomized controlled trial. European Journal of Public Health 2006, 17(2):214-220. 19. Bakker IM, Terluin B, Van Marwijk HWJ, Windt DAWM Van der, Rij- men F, Van Mechelen W, Stalman WAB: A cluster-randomized trial evaluating an intervention for patients with stress- related mental disorders and sick leave in primary care. PLoS Clin Trials 2007, 2(6):e26. DOI: 10.1371/journal.pctr. 0020026. 20. Van Rhenen W, Schaufeli WB, Van Dijk FJH, Blonk RWB: Coping and sickness absence. Int Arch Occup Environ Health 2008, 81:461-472. 21. Kwaliteitsinstituut voor de Gezondheidszorg CBO, Trimbos-instit- uut: Multidisciplinary Guidelines Anxiety Disorders 2003. Guidelines to Diagnose, Treat and Counsel Adults with an Anxiety Disorder. [In Dutch: Multidisciplinaire richtlijn angststoornissen 2003. Richtlijn voor de diagnos- tiek, behandeling en begeleiding van volwassen cliënten met een angst- stoornis Utrecht: Trimbos-instituut; 2003. 22. Öst L-G, Thulin U, Ramnerö J: Cognitive behavior therapy vs exposure in vivo in the treatment of panic disorder with agrophobia. Behavior Research and Therapy 2004, 42:1105-1127. 23. Van Balkom AJLM, De Haan NE, Van Oppen P, Spinhoven P, Hoog- duin KAL, Van Dyck R: Cognitive and behavioral therapies alone versus in combination with fluvoxamine in the treat- ment of obsessive compulsive disorder. J Nerv Ment Dis 1998, 186(8):492-499. 24. Foa EB, Hembree EA, Cahill SP, Rauch AM, Riggs DS, Feeny NC, Yadin E: Randomized trial of prolonged exposure for post- traumatic stress disorder with and without cognitive restructuring: outcome at academic and community clinics. J Consult Clin Psychol 2005, 73:953-964. 25. Aigner M, Demal U, Zitterl W, Bach M, Trappl E, Lenz G: Behavioral group therapy for obsessive-compulsive disorder. Verhalten- stherap 2004, 14:7-14. 26. Greist JH, Marks IM, Baer L, Kobak KA, Wenzel KW, Hirsch MJ, Man- tle JM, Clary CM: Behavior therapy for obsessive-compulsive disorder guided by a computer or by a clinician compared with relaxation as a control. J Clin Psychiatry 2002, 63:138-145. 27. Marks IM, Leilliott P, Basoglu M, Noshirvani H, Monteiro W, Cohen D, Kasvikis Y: Clomipramine, self-exposure and therapist- aided exposure for obsessive-compulsive rituals. Br J Psychiatry 1988, 152:522-534. 28. Cobb J, McDonald R, Marks I, Stern R: Marital versus exposure therapy: psychological treatments of co-existing marital and phobic-obsessive problems. Behav Analys Modif 1980, 3:3-16. 29. Foa EB, Steketee G, Grayson JB, Turner RM, Latimer PR: Deliberate exposure and blocking of obsessive-compulsive rituals: immediate and long-term effects. Behav Ther 1984, 15:450-472. 30. Salyards CJ: Non-visual flashbacks: in vivo versus imaginal exposure. In PhD thesis Milwaukee: Marquette University; 2006. 31. Grunert BK, Devine CA, Smith CJ, Matloub HS, Sanger JR, Yousif NJ: Graded work exposure to promote work return after severe hand trauma: a replicated study. Ann Plast Surg 1992, 29(6):532-536. 32. Altman DG, Schulz KF, Moher D, Egger M, Davidoff F, Elbourne D, Gøtzsche PC, Lang T: The revised CONSORT statement for reporting randomized trials: explanation and elaboration. Annals of Internal Medicine 2001, 134:663-694. 33. Drummond MF, Jefferson TO: Guidelines for authors and peer reviewers of economic submissions to the BMJ. BMJ 1996, 3(313(7052)):275-283. 34. NVAB [Dutch Association for Occupational Health], Manders JHM, Nauta AP, Lebbink M, eds: Guidelines for the management of mental health problems of workers by occupational physicians. [In Dutch: Neder- landse Vereniging voor Arbeids- en Bedrijfsgeneeskunde (NVAB)): Richtlijn handelen van de bedrijfsarts bij werkenden met psychische problemen] 2007 [http://nvab.artsennet.nl/Artikel/Psychische-Problemen.htm]. Utrecht: NVAB 35. Klink JJL Van der, Van Dijk FJH: Dutch practice guidelines for managing adjustment disorders in occupational and primary care. Scand J Work Environ Health 2003, 29(6):478-487. 36. Van Vliet IM, Leroy H, Van Megen HJM: The MINI-International Neu- ropsychiatric Interview: A Short Structured Diagnostic Interview for DSM-IV and ICD-10 Psychiatric Disorders. Dutch version 5.0.0. [In Dutch: De MINI- Internationaal neuropsychiatrisch interview: een kort gestructureerd diag- nostisch interview voor DSM-IV en ICD-10 psychiatrische stoornissen. Ned- erlandse Versie 5.0.0] Leiden: LUMC; 2000. 37. Sheehan DV, Lecrubier Y, Sheehan KH, Amorim P, Janavs J, Weiller E, Hergueta T, Baker R, Dunbar GC: The Mini-International Neu- ropsychiatric Interview (M.I.N.I.): the development and vali- dation of a structured diagnostic psychiatric interview for DSM-IV and ICD-10. J Clin Psychiatry 1998, 59(Suppl 20):22-33. 38. Terluin B, Van Marwijk HWJ, Adèr HJ, De Vet HCW, Penninx BWJH, Hermens MLM, Van Boeijen CA, Van Balkom AJLM, Klink JJL Van der, Stalman WAB: The Four-Dimensional Symptom Question- naire (4DSQ). BMC Psychiatry 2006, 6(34):1-20. 39. Spinhoven P, Ormel J, Sloekers PP, Kempen GI, Speckens AE, Van Hemert AM: A validation study of the Hospital Anxiety and Depression Scale (HADS) in different groups of Dutch sub- jects. Psychol Med 1997, 27:363-370. 40. Prins JB, Bleijenberg G, Bazelmans E, Elving LD, de Boo TM, Severens JL, Wilt GJ Van der, Spinhoven P, Meer JWM Van der: Cognitive behavior therapy for chronic fatigue syndrome: a multicen- tre randomized controlled trial. Lancet 2001, 357:841-47. 41. Beurskens AJHM, Bültmann U, Kant IJ, Vercoulen JHMM, Bleijenberg G, Swaen GMH: Fatigue among working people: validity of a questionnaire measure. Occup Environ Med 2000, 57:353-357. 42. Vercoulen JHMM, Swanink CMA, Fennis JFM, Galama JMD, Meer JWM Van der, Bleijenberg G: Dimensional assessment of chronic fatigue syndrome. Journal of Psychosomatic Research 1994, 38:383-392. 43. Aratake Y, Tanaka K, Wada K, Watanabe M, Katoh N, Sakata Y, Aizawa Y: Development of Japanese version of the checklist individual strength questionnaire in a working population. J Occup Health 2007, 49(6):453-460. 44. De Zwart BCH, Frings-Dresen MHW, Van Duivenbooden JC: Test- retest reliability of the Work Ability Index questionnaire. Occupational Medicine 2002, 52(4):177-181. 45. Ilmarinen J, Tuomi K: Work Ability Index for Aging Workers Helsinki: Finnish Institute of Occupational Health; 1993. 46. Van Veldhoven M, Meijman TF, Broersen JPJ, Fortuin RJ: Manual Ques- tionnaire Perception and Judgement of Work. [In Dutch: Handleiding Vra- genlijst Beleving en Beoordeling van de Arbeid (VBBA)] Amsterdam: SKB Vragenlijst Services; 2002. 47. Jager S, De Pater IE: Self-Efficacy of Work-Performance after Sick Leave due to Psychological Complaints. [In Dutch: Self-efficacy met betrekking tot werkuitvoering na verzuim van mensen met psychische klachten: het ontwikkelen en valideren van een nieuwe vragenlijst] Amsterdam: Univer- sity of Amsterdam; 2005. 48. Schreurs PJG, Tellegen B, Willige G Van de: The Utrecht Coping List: Manual. [In Dutch: De Utrechtse Coping Lijst: Handleiding] Lisse: Swets en Zeitlinger; 1988. 49. Schreurs PJG, Willige G Van de, Brosschot JF, Tellegen B, Graus GMH: The Utrecht Coping List: UCL. [In Dutch: De Utrechtse Coping Lijst: UCL] Lisse: Swets & Zeitlinger; 1993. 50. Verbeek JH, De Boer AG, Weide WE Van der, Piirainen H, Anema JR, Van Amstel RJ, Hartog F: Patient satisfaction with occupational health physicians, development of a questionnaire. Occup Environ Med 2005, 62:119-123. 51. Nieuwenhuijsen K, Verbeek JHAM, De Boer AGEM, Blonk RWB, Van Dijk FJH: Supervisory behavior as a predictor of return to work in employees absent from work due to mental health problems. Occup Environ Med 2004, 61:81-823. 52. Hakkaart-Van Roijen L, Van Straten A, Donker M, Tiemens B: Manual Trimbos/iMTA Questionnaire for Costs Associated with Psychiatric Illness (TiC-P)(in Dutch) Rotterdam: Institute for Medical Technology Assess- ment; 2002. 53. Oostenbrink JB, Bouwmans CAM, Koopmanschap MA, Rutten FFH: Manual for Costing: Methods and Standard Costs for Economic Evaluations in Health Care (in Dutch) Diemen: Health Insurance Board; 2004. 54. Hahn S, Puffer S, Torgerson DJ, Watson J: Methodological bias in cluster randomized trials. BMC Medical Research Methodology 2005, 5(10):1-8. Pre-publication history The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2458/9/140/pre pub Page 11 of 11 (page number not for citation purposes)