00463nas a2200157   4500000000100000008004100001100001800042700001400060700001500074700001600089700001400105245016100119300001200280490000700292050000600299       2009                            d1 aKnottnerus J.1 aSmeets R.1 aVlaeyen J.1 aSeverens J.1 aBeelen S.00aMore is not always better: cost-effectiveness analysis of combined, single behavioral and single physical rehabilitation programs for chronic low back pain.  a71-81. 0 v13  aY