[1] Department of Orthopedics,
[2] Chang Gung Memorial Hospital,undefined
[3] 5 Fu-Hsin St. 333,undefined
[4] Kweishan,undefined
[5] Taoyuan,undefined
[6] Taiwan e-mail: ccwu@mail.cgu.edu.tw,undefined
[7] Tel.: 886-3-3281200,undefined
[8] ext. 2163,undefined
[9] Fax: 886-3-3278113,undefined