Association between serum 25- hydroxyvitamin D and albuminuiria in middle-aged and older Chinese patients with type 2 diabetes.

"Declarations Ethics approval and consent to participateThe experimental protocol was established, according to the ethical guidelines of the Helsinki Declaration and was approved by the Human Ethics Committee of the People's Hospital of Gansu Province.Written informed consent was obtained from each participant before data collection.Due to the impact of the epidemic, the upload of the original file was delayed. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported in part by grants from Gansu Provincial Youth Science and Technology Fund Program;Number: 21JR1RA008;this study also was supported by grants fromGansu Provincial People's Hospital In-hospital Fund Program;Number: 18GSSY1-4."