Smartphone use patterns and problematic smartphone use among preschool children

• Jeong Hye Park ,

  Contributed equally to this work with: Jeong Hye Park, Minjung Park

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

  * E-mail: masternur@naver.com

  Affiliation Department of Nursing, Gyeongsang National University, Jinju-si, Gyeongsangnam-do, Republic of Korea

  https://orcid.org/0000-0002-7011-5888

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• Minjung Park

  Contributed equally to this work with: Jeong Hye Park, Minjung Park

  Roles Data curation, Funding acquisition, Investigation, Validation, Writing – original draft, Writing – review & editing

  Affiliation National Agency for Development of Innovative Technologies in Korean Medicine, National Institute of Korean Medicine Development, Seoul, Republic of Korea

  https://orcid.org/0000-0003-2219-9666

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