TY - CONF AU - Hodges P. AU - Macedo L. AU - Latimer Jane AU - W. Rodgers Todd AU - McAuley J. AU - Maher C. BT - Primary Care Research on Back Pain International Forum XII. CY - Odense, Denmark LA - eng PP - Odense, Denmark PY - 2012 EP - 58 T2 - Primary Care Research on Back Pain International Forum XII. TI - The fluctuating nature of low back pain: a cluster analysis. ER -