[1] Tradit Chinese Med Hosp Huangdao Dist, Dept Nursing, Qingdao, Shandong, Peoples R China
[2] Chengyang Peoples Hosp, Outpatient Dept, Qingdao, Shandong, Peoples R China
[3] Tradit Chinese Med Hosp Huangdao Dist, Dept Cardiovasc, Qingdao, Shandong, Peoples R China