CD 272篇 96.454% 07. Antigens，imToken钱包， Differentiation 269篇 95.390% 08. Animals 212篇 75.177% 09. Humans 161篇 57.092% 10. CD28 Antigens 148篇 52.482% https://kns.cnki.net/kns8s/search?classid=WD0FTY92kw=CTLA-4%E6%8A%97%E4%BD%93%E4%BB%8B%E5%AF%BCkorder=SU https://fx.wanfangdata.com.cn/keytrends/detail?theme_name=CTLA-4