1. Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
2. Intensive Care Unit, The Fifth Affiliated Hospital of Qiqihar Medical University (Daqing Longnan Hospital), Daqing, Heilongjiang 163453, P.R. China
3. Department of Nephrology, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
4. Department of Neurology, The Fifth Affiliated Hospital of Qiqihar Medical University (Daqing Longnan Hospital), Daqing, Heilongjiang 163453, P.R. China