TY - JOUR AU - Roberts C. AU - Algert C. AU - Cameron C. AU - Torvaldsen S. BT - Acta Obstetricia et Gynecologica Scandinavica CN - Y LA - eng LB - CVjournal PY - 2005 SE - 1.274 SP - 794 EP - 8. [Impact Factor 1.274] T2 - Acta Obstetricia et Gynecologica Scandinavica TI - A meta-analysis of upright positions in the second stage to reduce instrumental deliveries in women with epidural analgesia VL - 84 ER -