Changes in vitamin D status considering hemodilution factors in Japanese pregnant women according to trimester: A longitudinal survey

• Nobuko Takaoka ,

  Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Writing – original draft, Writing – review & editing

  * E-mail: takaoka@dokkyomed.ac.jp

  Affiliations Department of Public Health, Dokkyo Medical University School of Medicine, Mibu, Japan, Office of International Affairs, Center for International Cooperation, Dokkyo Medical University, Mibu, Japan

  http://orcid.org/0000-0001-5980-3033

  ⨯
• Keiko Nishida,

  Roles Data curation, Writing – review & editing

  Affiliations Department of Public Health, Dokkyo Medical University School of Medicine, Mibu, Japan, Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan

  ⨯
• Toshimi Sairenchi,

  Roles Conceptualization, Supervision, Writing – review & editing

  Affiliation Department of Public Health, Dokkyo Medical University School of Medicine, Mibu, Japan

  ⨯
• Mitsumasa Umesawa,

  Roles Conceptualization, Writing – review & editing

  Affiliation Dokkyo Medical University, Mibu, Japan

  ⨯
• Rie Noguchi,

  Roles Data curation, Writing – review & editing

  Affiliation Department of Obstetrics & Gynecology, Ibaraki Seinan Medical Center Hospital, Sashima, Japan

  ⨯
• Katsumi Someya,

  Roles Data curation, Writing – review & editing

  Affiliation Department of Obstetrics & Gynecology, Ibaraki Seinan Medical Center Hospital, Sashima, Japan

  ⨯
• Gen Kobashi

  Roles Supervision, Writing – review & editing

  Affiliation Department of Public Health, Dokkyo Medical University School of Medicine, Mibu, Japan

  ⨯