By Nishihara Kyoko   Horiuchi Shigeko   Eto Hiromi   Kikuchi Sawa   Hoshi Yoko   in Chronobiology International

ISSN:0742-0528|29|3|363-370

Informa Healthcare‎(2012)‎

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By Kataoka Yaeko   Nakayama Kaori   Yaju Yukari   Eto Hiromi   Horiuchi Shigeko   in International Journal of Childbirth

ISSN:2156-5295|5|4|200-209

Springer Publishing Company ‎(2015)‎

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