00383nas a2200145   4500000000100000008004100001260002000042100001600062700001600078700001400094700001600108700002100124245008400145300000800229       2012                            d  aOdense, Denmark1 aCrowther M.1 aVerhagen A.1 aSutton A.1 aHerbert Rob1 aFerreira Manuela00aWhen is another clinical trial on exercise for chronic low back pain justified?  a182