Affiliation: | 1. Department of Anesthesiology, North China University of Science and Technology Affiliated Hospital, Tangshan, P.R. China;2. Department of Paediatrics, North China University of Science and Technology Affiliated Hospital, Tangshan, P.R. China;3. Department of Neurosurgery, North China University of Science and Technology Affiliated Hospital, Tangshan, P.R. China;4. Department of Neurology, Tangshan People's Hospital, Tangshan, P.R. China |