Although many achievements were obtained after years of hard work, the nosogenetic mechanism of the disease has not been completely clarified and the ideal cured method has not been found yet.

• 医学界已经对此病进行了多年的研究探索，虽然取得了很大进展，但至今尚未完全阐明其发病机制，也未寻得理想的治愈方法。