1. Department of Neurosurgery, Chonnam National University Research Institute of Medical Science, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Hwasun, Korea.
2. Department of Pathology, Chonnam National University Research Institute of Medical Science, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Hwasun, Korea.