00302nas a2200121   4500000000100000008004100001260003100042100001700073700001600090700001300106245005500119050000600174       2006                            d  aAmsterdam, The Netherlands1 aRefshauge K.1 aHenschke N.1 aMaher C.00aWhat is the real prognosis of acute low back pain?  aN