TY - CONF AU - Macedo L. AU - Herbert Rob AU - Kamper S. AU - Maher C. BT - Amsterdam International Forum VIII. Primary care research on low back pain CY - Amsterdam, the Netherlands LA - eng LB - MS PP - Amsterdam, the Netherlands PY - 2006 EP - 56 T2 - Amsterdam International Forum VIII. Primary care research on low back pain TI - Using placebo controls in low back pain research. Part 1: Acupuncture, manual therapy and exercise ER -