The role of activity in the therapeutic management of back pain. Report of the International Paris Task Force on Back Pain. - Abenhaim,L.; Rossignol,M.; Valat,J.P.; Nordin,M.; Avouac,B.; Blotman,F.; Charlot,J.; Dreiser,R.l.; Legrand,E.; Rozenberg,S.; Vautravers,P. (Spine, 2000)