China, Nov. 3 -- The Chinese Clinical Trial Registry (ChiCTR) received information related to the study titled 'Study on the dose-response relationship between serum 25(OH)D levels in preschool children and the risk of recurrent respiratory tract infections'. The following are the other relevant details related to the trial:

Registration Number: ChiCTR2600135730

Registration Time: 2026/11/02

Type: Observational study

Primary Sponsor: Meishan City Peoples Hospital

To know more, click on https://www.chictr.org.cn/showprojEN.html?proj=303093

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