00319nas a2200133   4500000000100000008004100001100001500042700001200057700001400069700001600083245006800099300001100167490000700178       2002                            d1 aRoberts C.1 aPeat B.1 aAlgert C.1 aCarnegie M.00aOperative delivery during labour: trends and predictive factors  a115-230 v16