[1] Inner Mongolia Univ Nationalities, Affiliated Hosp, Dept Pathol, Tongliao 028000, Peoples R China
[2] Tongliao Hosp Inner Mongolia, Dept Cardiovasc Med, Tongliao 028000, Peoples R China
[3] Inner Mongolia Univ Nationalities, Affiliated Hosp, Dept Thorac Surg, Tongliao 028000, Peoples R China
[4] China Natl Petr & Nat Gas Corp, Cent Hosp, Dept Oncol, Langfang, Hebei, Peoples R China
[5] Inner Mongolia Univ Nationalities, Affiliated Hosp, Dept Ophthalmol, Tongliao 028000, Peoples R China