1 Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, 20 Boramae-ro 5-gil, Dongjak-gu, Seoul, 07061, South Korea.
2 Department of Neurology, Seoul National University Hospital, Seoul, South Korea.
3 Department of Neurology, Kyung Hee University Medical Center, Seoul, South Korea.
4 Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, 20 Boramae-ro 5-gil, Dongjak-gu, Seoul, 07061, South Korea. wieber77@gmail.com.
5 Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea.
6 Rare Disease Center, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea.