著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) SHARMA SK,Cesarean delivery : a randomized trial of epidural analgesia versus intravenous meperidine analgesia during labor in nulliparous women,Anesthesiology,,,2002,96,,546-551,https://cir.nii.ac.jp/crid/1573950399950381952,https://doi.org/10.1097/00000542-200203000-00007