00424nas a2200145   4500000000100000008004100001100001500042700001400057700001500071700001800086245012800104300003300232490000700265050000600272       2005                            d1 aRoberts C.1 aAlgert C.1 aCameron C.1 aTorvaldsen S.00aA meta-analysis of upright positions in the second stage to reduce instrumental deliveries in women with epidural analgesia  a794-8. [Impact Factor 1.274]0 v84  aY