1. Department of NeurologyShenyang First People's Hospital, Shenyang Medical College Shenyang China
2. Department of BiostatisticsSchool of Public Health, Fudan University Shanghai China
3. Department of Clinical EpidemiologyShengjing Hospital of China Medical University Shenyang China
4. Department of Medical LaboratoryShenyang First People's Hospital, Shenyang Medical College Shenyang China