[1] Natl Sun Yat Sen Univ, Dept Marine Biotechnol & Resources, Kaohsiung 804, Taiwan
[2] Shin Kong Wu Ho Su Mem Hosp, Dept Anesthesiol, Taipei, Taiwan
[3] Fu Jen Catholic Univ, Sch Med, Dept Med, Taipei, Taiwan
[4] Chang Gung Univ, Coll Med, Chang Gung Mem Hosp, Kaohsiung Med Ctr,Dept Neurosurg, Kaohsiung, Taiwan
[5] Natl Yang Ming Univ, Taipei Vet Gen Hosp, Dept Anesthesiol, Taipei 112, Taiwan
[6] Natl Yang Ming Univ, Sch Med, Taipei 112, Taiwan
[7] Pingtung Christian Hosp, Sect Orthoped Surg, Pingtung, Taiwan
[8] Pingtung Christian Hosp, Dept Surg, Pingtung, Taiwan