TY - JOUR AU - Verbunt J. AU - Smeets R. AU - van Geel K. BT - Archives of Physical Medicine and Rehabilitation CN - Y LA - eng LB - MS PY - 2009 SP - 109 EP - 17. T2 - Archives of Physical Medicine and Rehabilitation TI - Is the fear avoidance model associated with the reduced level of aerobic fitness in patients with chronic low back pain? VL - 90 ER -