Authors:
HEISTARO S
VARTIAINEN E
HELIOVAARA M
PUSKA P
Citation: S. Heistaro et al., TRENDS OF BACK PAIN IN EASTERN FINLAND, 1972-1992, IN RELATION TO SOCIOECONOMIC-STATUS AND BEHAVIORAL RISK-FACTORS, American journal of epidemiology, 148(7), 1998, pp. 671-682