Ching-Jen Wang*, Shan-Ling Hsu, Lin-Hsiu Weng, Yi-Chih Sun and Feng-Sheng Wang
* Corresponding author: Ching-Jen Wang W281211@adm.cgmh.org.tw
BMC Musculoskeletal Disorders 2013, 14:44 doi:10.1186/1471-2474-14-44