1. Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Kagoshima, Japan
2. Department of Pathology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Kagoshima, Japan
3. Pituitary Disorders Center, Kagoshima University Hospital, Kagoshima, Kagoshima, Japan
4. Department of Neurosurgery, Fujimoto General Hospital, Miyakonojo, Miyazaki, Japan