@article{20202,
  author = {Ferreira P. and Beckenkamp Paula and Hopper J. and Maher C. and Ferreira Manuela},
  title = {Nature or nurture in low back pain? Results of a systematic review of studies based on twin samples.},
  year = {2013},
  journal = {Journal of Pain},
  edition = {20 January 2013},
  language = {eng},
}