TY - JOUR AU - Wenig, C M; Schmidt, C O; Kohlmann, T TI - Costs of backpain in Germany JO - Eur J Pain VL - 13 PY - 2009 DO - 10.1016/j.ejpain.2008.04.005 L3 - PubMed-ID: 18524652 SP - 280 EP - 286 N1 - et al. ER -