[1] Shandong Univ, Qilu Hosp, Dept Phys Med & Rehabil, Jinan 250012, Shandong, Peoples R China
[2] Shandong Univ, Qilu Hosp, Dept Radiat Oncol, Jinan 250012, Shandong, Peoples R China
[3] Dongying Peoples Hosp, Dept Phys Med & Rehabil, Dongying 257091, Shandong, Peoples R China
[4] Yuhuangding Hosp, Dept Phys Med & Rehabil, Yantai 264000, Shandong, Peoples R China