1. Department of Neurology, Xi’an Ninth Hospital Affiliated to Medical College of Xi’an Jiaotong University, Xi’an, China
2. Key Laboratory of Biomedical Information Engineering of Education Ministry, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China
3. Center for Evidence Synthesis in Health, Brown University School of Public Health, Providence, Rhode Island, USA
4. Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts, USA