The NHS states it may be genetic or caused by a chemical imbalance in the brain.
英国国家医疗服务体系认为可能是基因导致的或者由于大脑内部某种化学物质失衡导致的。
3
Finally confirmed: onset is due to rheumatoid arthritis patients due to genetic, trauma, infection caused by other factors such as t - lymphocyte imbalance caused by cause immune system disorders.