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All methods were performed in accordance with the ethical standards of the Institutional Review Board and with the principles of the 1964 Declaration of Helsinki and its later amendments. Informed consent was obtained from all individual participants and their legal guardians included in the study.","order":1,"name":"Ethics","label":"Ethical approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"This study was approved by the Institutional Review Board (IRB) of the Faculty of Medicine, Zagazig University (reference number: ZUIRB#2330\/1952026). All methods were performed in accordance with the ethical standards of the Institutional Review Board and with the principles of the 1964 Declaration of Helsinki and its later amendments. Informed consent was obtained from all individual participants and their legal guardians included in the study.","order":2,"name":"Ethics","label":"Human ethics and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"328"}}