Joung Eun Kim1 Hyo Sang Lee2* Wooyoung Jang3* 1Department of Family Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea 2Department of Nuclear Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea 3Department of Neurology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea Background: Since environmental factors, especially heavy metals, were highlighted...