The causes of IBS are unclear and there has been debate whether it is mostly due to psychological factors or biological triggers, or perhaps a combination.
病因尚不得知，就其是否是心理因素或者是生理因素还是综合的情况争论至今不休。
The causes of IBS are unclear and there has been debate whether it is mostly due to psychological factors or biological triggers, or perhaps a combination.
病因尚不得知，就其是否是心理因素或者是生理因素还是综合的情况争论至今不休。
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