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Ando, Hitomi, Shintaro Makino, Jun Takeda, Yojiro Maruyama, Shuko Nojiri, Hiroyuki Sumikura, και Atsuo Itakura. "Comparison of the Labor Curves With and Without Combined Spinal-epidural Analgesia in Nulliparous Women- a Retrospective Study." BMC Pregnancy Childbirth 2020.

Ando, Hitomi, et al. "Comparison of the Labor Curves With and Without Combined Spinal-epidural Analgesia in Nulliparous Women- a Retrospective Study." BMC Pregnancy Childbirth 2020.