1. Department of Anesthesiology, Chi Mei Medical Center, Tainan 71004, Taiwan
2. Department of Hospital and Health Care Administration, College of Recreation and Health Management, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
3. School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
4. Department of Neurology, Chi Mei Medical Center, Tainan 71004, Taiwan
5. The Center for General Education, Southern Taiwan University of Science and Technology, Tainan 71004, Taiwan
6. Department of Internal Medicine, Chi Mei Medical Center, Tainan 71004, Taiwan