[1] Shandong Univ, Dept Anat, Sch Med, Jinan, Shandong, Peoples R China
[2] Shandong Univ, Dept Cardiosurg, Qilu Hosp, Jinan, Shandong, Peoples R China
[3] Binzhou Med Coll, Dept Histol & Embryol, Binzhou, Peoples R China
[4] Shandong Univ, Dept Orthopaed, Qilu Hosp, Jinan, Shandong, Peoples R China
[5] Shandong Univ, Dept Rheumatol, Qilu Hosp, 107 Wenhua Xi Rd, Jinan 250012, Shandong, Peoples R China