Effectiveness of behavioral graded activity after first-time lumbar disc surgery: short term results of a randomized controlled trial

per Ostelo, R. W. J. G., de Vet, H. C. W., Berfelo, M. W., Kerckhoffs, M. R., Vlaeyen, J. W. S., Wolters, P. M. J. C., van den Brandt, P. A.
Publicat 2003