[1] Weifang Peoples Hosp, Dept Anesthesiol, Weifang, Peoples R China
[2] Weifang Hosp Tradit Chinese Med, Dept Anesthesiol, Weifang, Peoples R China
[3] Weifang Peoples Hosp, Dept Pain Management, Weifang, Peoples R China
[4] Weifang Peoples Hosp, Dept Ultrasonog, Weifang, Peoples R China
[5] Weifang Peoples Hosp, Dept Ultrasonog, 151 Guangwen St, Weifang City, Shandong, Peoples R China