References
- Waddell A. A historical perspective of low back pain. Acta Otthop Scand 1989; 60((Suppl. 234))1–23
- de Girolamo G. Epidemiology and social cost of low back pain and fibromyalgia. Pain 1991; 7((Suppl. 1))1–7
- Scientific approach to the assessment and management of activity-related spinal disorders. A monography for clinicians. Report of the Quebec Task Force on spinal disorders. Spine 1987; 12((Suppl. 1))1–59, LeBlanc FE ed
- Tellnes G. Sickness certification in general practice: a review. Fam Pract 1989; 6: 58–65
- Tellnes G, Sandvik L, Mourn T. Inter-doctor variation in sickness certification. Scand J Prim Health Care 1990; 8: 45–52
- Condren L, Cox J, McCormick J S, Sullivan A. Certification of unfitness for work. Ir Med J 1984; 77: 159–60
- Rutle O, Forsén L. Almenpraksis - tema med variasjonar. (Inter-doctor variation in general practice). National Institute of Public Health, Department of Health Services Research, Oslo 1984, (English summary).Report no. 8, 1984
- Campbell E JM, Scadding J G, Roberts R S. The concept of disease. BMJ 1979; ii: 757–62
- Apple D. How laymen define illness. J Health Hum Behav 1960; 1: 219–25
- Falkum E. Health related conceptions, attitudes and behaviour. A study among Norwegian employees. (Dissertation). Norsk bedriftshelsetjeneste 1988; 9((Suppl 1))1988
- Miller D C. Handbook of research design and social measurement. 5th ed. Sage Publications, Newbury Park, Cal. 1991
- Morrell D C, Roland M O. Analysis of referral behaviour: responses to simulated case histories may not reflect real clinical behaviour. Br J Gen Pract 1990; 40: 182–5
- Bjømdal A, Fugelli P. Can regional differences in consumption of tranquillizers and hypnotics be explained by variations in general practitioners' threshold of prescribing? A methodological study. Scand J Prim Health Care 1989; 7: 67–71
- Howie J GR. Clinical judgment and antibiotic use in general practice. BMJ 1976; ii: 1061–4
- Kirwan J R, Bellamy N, Condon H, Buchanan W W, Barnes C G. Judging “current disease activity” in rheumatoid arthritis - an international comparison. J Rheumatol 1983; 10: 901–5
- Brage S, Håland Haldorsen E M, Johannesen T S, Ursin H, Tellnes G. The use of case histories to explore concepts of disease, illness and sickness certification. Fam Pract. 1995; 12: 75–83
- Twaddle A C, Hessler R M. A sociology of health. 2nd ed. Macmillan Publ Co, New York 1987
- Tellnes G, Bruusgaard D, Sandvik L. Occupational factors in sickness certification. Scand J Prim Health Care 1990; 8: 37–44