TY - CONF AU - Pinheiro M AU - Refshauge KM AU - Colodro-Conde L AU - Carrillo E AU - Hopper JL AU - AU - Ferreira P AU - Ferreira Manuela BT - XIII International Back Pain Forum CY - Sao Paulo, Brazil LA - eng LB - MSK PP - Sao Paulo, Brazil PY - 2014 EP - 54 T2 - XIII International Back Pain Forum TI - Are symptoms of depression associated with low back pain when genetics is considered? A population-based study of spanich twins [proceedings] ER -