IGHE and acrodermatitis enteropathica: Onset of AE was seen in the phase of early childhood (0–6 years), late childhood (7–12 years), adolescence (13–18 years), young adulthood (19–29 years), late adulthood (30–59 years), and senile (≥60 years) in the IgE-allergic AE patients; and in the phase of early childhood, adolescence, late adulthood, and senile in the non-IgE-allergic AE patients.