[1] Harbin Med Univ, Dept Nursing, Daqing Campus,39 Xinyang Rd, Daqing 163319, Peoples R China
[2] Sartu Dist Dongfeng St Community Hlth Serv Ctr, Bldg 2-54,Xincun Dist 2, Daqing 163001, Sartu District, Peoples R China
[3] Harbin Med Univ, Dept Basic Med, 39 Xinyang Rd, Daqing Campus, Daqing 163319, Peoples R China