1. Abenhaim, L., & Sulssa, S. (1987). Importance and economic burden of occupational back pain: A study of 2,500 cases representative of Quebec. Journal of Occupational Medicine, 29, 670–674.
2. Ahern, D. K., Iezzi, A., Hursey, K., & Follick, M. J. (1988). The co-occurrence of chronic low back pain and headache: Prevalence, neuroticism, and treatment outcome. Clinical Journal of Pain, 4, 27–31.
3. American College of Sports Medicine. (1980). Guidelines for graded exercise testing and exercise prescription. Philadelphia: Lea & Febiger.
4. American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders, 4th ed. (DSM-IV). Washington, DC: Author.
5. Armstrong, T. J., Fine, L J., Goldstein, S. A., Lifshitz, Y R., & Silverstein, B. A. (1987). Ergonomic considerations in hand and wrist tendinitis. Journal of Hand Surgery, 12A, 830–837.