mi song choi department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea bom choi department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea soo jin cho department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea joo yong kim department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea ki han kwon department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea suk yun kang department of neurology, school of medicine, dongtan sacred heart hospital, hallym university, hwaseong si, republic of korea