TY - CPAPER AU - Macedo L. AU - Herbert Rob AU - Clare H. AU - McAuley J. AU - Maher C. BT - 15th International World Confederation for Physical Therapy Congress CY - Vancouver, Canada LA - eng LB - MS PP - Vancouver, Canada PY - 2007 T2 - 15th International World Confederation for Physical Therapy Congress TI - Trials and tribulations: challenges encountered conducting a randomised controlled trial on the McKenzie method ER -