Funding for this research was provided by:
RECETOX Research Infrastructure of Masaryk University CETOCOEN PLUS (CZ.02.1.01/0.0/0.0/15_003/0000469)
National Feasibility Program of the Ministry of Education of the Czech Republic (LO1214)
CELSPAC: Central European Longitudinal Study of Pregnancy and Childhood (MUNI/M/1075/2013)
Received: 14 November 2021
Accepted: 6 April 2022
First Online: 12 April 2022
: The study was approved by the ethics committee of the Faculty of Science Institutional Review Board, Masaryk University, Brno, Czech Republic. The ELSPAC study which was established at the beginning of the project by the coordinating team, promoted the international legal and ethics framework of the study design. Informed consent was sought from all study participants during each data collection, when using both self-administered questionnaires and transcriptions of medical records. Informed consent forms and information leaflets for study participants were an integral part of each questionnaire and was obtained from all subject's parents and/or legal guardian. Confidentiality and data protection were high priorities of the study. Only anonymous (often aggregated) data are available for research purposes. Each participant was assigned a unique code by the database system, with participant names, birthdates, and contact details kept separately [CitationRef removed]. All methods were performed in accordance with the relevant guidelines and regulations of the Declaration of Helsinki and the procedures were anonymous.
: Parental/guardian written informed consent obtained.
: The authors declare that they have no competing interests.