Serum uric acid predicts therapeutic response to midodrine hydrochloride in children with vasovagal syncope: a pilot study.

"Declarations Ethics approvalThis study was conducted in accordance with the Declaration of Helsinki’s principles. This study was authorized by the Medical Ethics Committee of Peking University First Hospital (No. 2022496), and informed consent was obtained from individual participants and their parents. Conflict of interestThe authors declare no competing interests. Conflict of interest The authors declare no competing interests."

"Fundings This work was supported by the Fundamental Research Funds for the Central Universities, China; Clinical Medicine Plus X-Young Scholars Project (PKU2022LCXQ028); and the National High-Level Hospital Clinical Research Funding (Multi-center Clinical Research Project of Peking University First Hospital) (2022CR59)."