00323nas a2200145   4500000000100000008004100001100001500042700001300057700001300070700001600083700001300099245004700112300001000159490000800169       2000                            d1 aCumming R.1 aIvers R.1 aButler M1 aCampbell A.1 aNorton R00aVisual impairment and risk of hip fracture  a633-90 v152