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Author Hong-Mei Song is a member of the Editorial Board for\n                      World Journal of Pediatrics\n                      . The paper was handled by the other Editor and has undergone rigorous peer review process. Author Hong-Mei Song was not involved in the journal review of, or decisions related to, this manuscript.\u00a0The authors have no conflict of interest to declare.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}