Alopecia Areata is classified as an autoimmune disease, although its cause is unknown.
斑秃是一种自身免疫性疾病列为，虽然其原因是未知的。
Its cause is unknown, but a complex mixture of genetic and environmental risk factors is thought to be to blame in many cases.
这种疾病的致病原因未明，但是基因和外部环境不良因素的综合影响被认为是其致病的重要原因。
Its cause is unknown, and the lack of obvious signs or definitive tests has led some doctors to question whether it is a physical or psychological problem.
原因还未查明，由于缺乏明显证据及明确的测试导致一些医生质疑这是否是身体或心理问题。
Although its underlying cause is unknown, Atopic Eczema appears to be an excessive response of the body's immune system to allergens.
虽然其背后的原因是未知之数，异位性湿疹，似乎是一种过度反应，对人体免疫系统的过敏原。
Although its underlying cause is unknown, Atopic Eczema appears to be an excessive response of the body's immune system to allergens.
虽然其背后的原因是未知之数，异位性湿疹，似乎是一种过度反应，对人体免疫系统的过敏原。
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