1. Department of Nursing, Asan Medical Center, Seoul, Republic of Korea
2. College of Nursing, Korea University Nursing Research Institute, Korea University, Seoul, Republic of Korea
3. College of Nursing, Korea University, Seoul, Republic of Korea
4. Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
5. Pacific Parkinson’s Research Centre, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, Canada
6. Department of Neurology, Heavenly Hospital, Goyang, Republic of Korea
7. Department of Neurology, Seoul Medical Center, Seoul, Republic of Korea
8. Department of Neurology, Jeonbuk National University Medical School and Hospital, Jeonju, Republic of Korea