1. Hahn YS, Choi JU, Lee HJ (1970) Intraspinal epidermoid. Korean Central J Med 19:283–287
2. Choi JU, Kim HC, Chung SS, Hahn YS, Lee HJ (1973) The narrow spinal canal: a clinical and radiological review. Korean Central J Med 25:477–483
3. Choi JU, Kim HC, Chung SS, Hahn YS, Lee HJ (1973) A case of trigeminal neuralgia treated with percutaneous radiofrequency lesions. J Korean Neurosurg Soc 2:116–118
4. Choi JU (1974) Optokinetic response in the cerebral lesions. New Med J 17:11–16
5. Choi JU, Lee HJ (1976) Spasmolytic effects of topically applied dexamethasone on the spasm of feline basilar artery. Yonsei J Med Sci 9:99–109