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Trail profile: The 115 children who met the criteria for inclusion and signed the informed assent were divided into LEV group and control group randomly by 2:1 ratio. During the 48-week follow-up period, 13 children were lost to follow-up, four were diagnosed with epilepsy, five were noncompliant and discontinued their participation in the study, and 93 achieved the treatment goal at the end of the follow-up period.
