Department;
of;
Otorhinolaryngology;
Second;
Hospital;
of;
Xi’an;
Jiaotong;
University;
Second;
Hospital;
of;
Xi’an;
Jiaotong;
University;
Xi’an;
710004;
China;
Xi’an;
710004;
China;
transformation; formation; effusion; granulation; tissue; otitis; media;