[1] Harbin Normal Univ, Sch Educ Sci, Harbin, Peoples R China
[2] Harbin Normal Univ, Sch Marxism, Harbin, Peoples R China
[3] Dalian Yuwen Middle Sch, Dalian, Peoples R China
[4] Civil Aviat Gen Hosp, Emergency Intens Care Unit, PR, Beijing, Peoples R China
[5] Qingdao Univ, Normal Coll, Qingdao 266071, Peoples R China
[6] Qingdao Univ, Fac Teacher Educ, Qingdao 266071, Peoples R China
[7] Renmin Univ China, Sch Educ, Beijing, Peoples R China