L. KAILA-KANGAS, K. LAGERROOS, M. HELIOVAARA, H. RIIHIMAKI, P. LEINO-ARJAS. (2006). HISTORY OF PHYSICAL WORK EXPOSURES AND CLINICALLY DIAGNOSED SCIATICA AMONG WORKING AND NON-WORKING FINNS AGED 30-64 YEARS IN THE HEALTH 2000 STUDY