Thyroid disturbances after COVID-19 and the effect of vaccination in children: a prospective tri-center registry analysis.

"Declarations Ethics approvalThe study was conducted in accordance with the World Medical Association’s Declaration of Helsinki and was approved by the Hungarian Medical Research Council (ETT-TUKEB, IV/5943–1/2021/EKU). Informed consentInformed consent was obtained from all children’s parents who were included in our research facility. Consent to participateInformed consent was obtained from all children’s parents who were included in our research facility. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open access funding provided by Semmelweis University. This work was supported by the ÚNKP-22–3-I new national excellence program of the Ministry of Culture and Innovation from the source of the National Research, Development and Innovation Fund (grant number: ÚNKP-22–3-I-SE-58). The sponsor had no role in the study design, data collection, analysis, interpretation, writing of the report and decision to submit the paper for publication."