Evaluation of 25-hydroxyvitamin D (25(OH)D) levels before and during the COVID-19 pandemic: A cross-sectional study and trend analysis involving 86,772 samples

• Mehmet Emin Arayıcı ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: mehmet.e.arayici@gmail.com

  Affiliation Department of Preventive Oncology, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey

  https://orcid.org/0000-0002-0492-5129

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• Sila Ovgu Korkut-Uysal,

  Roles Conceptualization, Data curation, Methodology, Resources, Software, Supervision, Validation, Writing – original draft, Writing – review & editing

  Affiliation Faculty of Engineering and Architecture, Department of Engineering Sciences, Izmir Katip Celebi University, Izmir, Turkey

  https://orcid.org/0000-0003-4784-2013

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• Asim Leblebici,

  Roles Conceptualization, Data curation, Methodology, Resources, Software, Validation, Visualization, Writing – review & editing

  Affiliation Department of Translational Oncology, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey

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• Zeynep Akcali,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Software, Supervision, Validation, Visualization, Writing – review & editing

  Affiliation Department of Translational Oncology, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey

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• Deniz Tuna Edizer,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Supervision, Writing – original draft, Writing – review & editing

  Affiliation Department of Translational Oncology, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey

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• Seher Kabul,

  Roles Data curation, Investigation, Methodology, Resources, Supervision, Writing – review & editing

  Affiliation Faculty of Medicine, Department of Biochemistry, Dokuz Eylul University, Izmir, Turkey

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• Dilek Cimrin,

  Roles Conceptualization, Data curation, Investigation, Methodology, Supervision, Writing – review & editing

  Affiliation Department of Medical Services and Techniques, Medical Laboratory Techniques Program, Vocational School of Health Services, Dokuz Eylul University, Izmir, Turkey

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• Ender Berat Ellidokuz

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Supervision, Writing – original draft, Writing – review & editing

  Affiliation Faculty of Medicine, Department of Gastroenterology, Division of Internal Medicine, Dokuz Eylul University, Izmir, Turkey

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