TY - JOUR AU - Ferreira P. AU - Herbert Rob AU - Latimer Jane AU - Ferreira Manuela BT - Australian Journal of Physiotherapy CN - Y LA - eng LB - MS PY - 2009 SP - 123 EP - 7. T2 - Australian Journal of Physiotherapy TI - People with low back pain typically need to feel 'much better' to consider intervention worthwhile: an observational study VL - 55 ER -