00454nas a2200145   4500000000100000008004100001260010600042100001600148700001100164700001400175700001300189700002100202245007800223300000700301       2011                            d  c229604465859bProceedings of the Australian Physiotherapy Association ConferenceaBrisbane, Australia1 aFerreira P.1 aLam J.1 aHopper J.1 aMaher C.1 aFerreira Manuela00aRisk factors for low back pain among twins- a web-based population survey  a29