Clinical features of ERA patients at the end of two-year follow-up.

CHAQ, Childhood Health Assessment Questionnaire. †frequency/total, n (%), between-group comparisons: chi-square test. ‡mean (standard deviation), between-group comparison: Student’s t-test. *p<0.05 denotes a significant difference between different groups. Clinical features of ERA patients at the end of two-year follow-up.