Does the heritability of chronic low back pain depend on how the condition is assessed?

1. Carvalho-E-Silva, A.P.M.C.
2. Harmer, A.R.
3. Pinheiro, M.B.
4. Madrid-Valero, J.J.
5. Ferreira, M.
6. Ordoñana, J.R.
7. H.Ferreira, P.