Working several additional hours all the time and overburdening one's back in younger years because of enthusiasm to prove oneself to society and the elders can make that happen too - just as bad food all the time... And it can also happen to you that you don't know what you have done wrong and still you got some condition that doesn't go away anymore.
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And it can also happen to you that you don't know what you have done wrong and still you got some condition that doesn't go away anymore.