Association of serum transforming growth factor β₁ with left ventricular hypertrophy in children with primary hypertension.

"Declarations Ethics approvalThe trial had approval from the Ethics Committee of the Capital Institute of Pediatrics (No. SHERLL2021021). Each child’s parent or legal guardian/next of kin provided signed informed consent. This study was performed in line with the principles of the Declaration of Helsinki and its later amendments. Consent to participateAll participants gave their written consent to participate. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding The current study was funded by the Research Foundation of Capital Institute of Pediatrics (LCPY-2021-02), the Capital Clinical Diagnosis and Treatment Technology and Translational Research Program of Beijing Municipal Science and Technology Commission (Z211100002921035), and the Capital’s Funds for Health Improvement and Research (CFH2022-3-2105)."