1 Department of Orthopedic Surgery (G.C.L., J.-Y.L.), Division of Infectious Disease, Department of Internal Medicine (D.-M.K., N.R.Y.), Department of Neurosurgery (S.-W.K.), School of Medicine, Chosun University Gwangju, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717, Republic of Korea. [email protected].