[1] China Med Univ, Coll Chinese Med, Sch Chinese Med, Taichung 404, Taiwan
[2] China Med Univ, China Med Univ Hosp, Dept Urol, Taichung 404, Taiwan
[3] China Med Univ, Sch Med, Taichung 404, Taiwan
[4] Natl Taiwan Univ, Coll Med, Inst Toxicol, Taipei 100, Taiwan
[5] Changhua Christian Hosp, Dept Otorhinolaryngol Head & Neck Surg, Changhua 500, Taiwan
[6] Chung Shan Med Univ, Coll Hlth Care & Management, Dept Occupat Safety & Hlth, Taichung 402, Taiwan
[7] Chung Shan Med Univ Hosp, Dept Occupat Med, Taichung 402, Taiwan
[8] Natl Taiwan Univ, Natl Taiwan Univ Hosp, Dept Surg, Taipei 10043, Taiwan
[9] Natl Taiwan Univ, Dept Surg, Coll Med, Taipei 10043, Taiwan
[10] Buddhist Tzu Chi Gen Hosp, Taichung Branch, Dept Emergency, Taichung 427, Taiwan
[11] Changhua Christian Hosp, Dept Occupat Med, Changhua 500, Taiwan
[12] China Med Univ, Dept Physiol, Taichung 404, Taiwan
[13] China Med Univ, Grad Inst Basic Med Sci, Sch Med, Coll Med, Taichung 404, Taiwan