[1] Chung Shan Med Univ Hosp, Dept Surg, Taichung, Taiwan
[2] Chung Shan Med Univ, Sch Med, Taichung, Taiwan
[3] Feng Yuan Hosp, Minist Hlth & Welf, Dept Orthoped, Taichung, Taiwan
[4] Natl Sun Yat Sen Univ, Inst Med Sci & Technol, Kaohsiung, Taiwan
[5] Minghsin Univ Sci & Technol, Dept Sr Serv Ind Management, Hsinchu, Taiwan
[6] Shu Te Univ, Dept Recreat & Sport Management, Kaohsiung, Taiwan
[7] Changhua Christian Hosp, Dept Internal Med, Div Allergy Immunol & Rheumatol, Changhua, Taiwan
[8] Chung Shan Med Univ, Inst Med, Taichung, Taiwan
[9] Wei Gong Mem Hosp, Dept Surg, Toufen, Taiwan