@misc{misc0eea5d5e,
title   = {Overviews and systematic reviews on low back pain [Letters]},
author = {Bjordal, Jan M. and Klovning, Atle and Lopes-Martins, Rodrigo Alvaro Brandão and Roland, Pål-Didrik Hoff and Joensen, Jon and Slordal, Lars},
year = {2008},
journal   = {Annals of Internal Medicine}
}