^pof;
Internal;
Medicine;
^pof;
Rheumatology,;
Peking;
Union;
Medical;
College;
Hospital,;
Chinese;
Academy;
of;
Medical;
Sciences;
&;
Peking;
Union;
Medical;
College,;
Beijing;
100730,;
China;
类风湿关节炎; 病例报告; 瘢痕; 自身免疫性; 住院治疗; 发病率; 粘液性; 粘膜;