1. Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing, China
2. Beijing Municipal Key Laboratory of Clinical Epidemiology, Capital Medical University, Beijing, China
3. Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
4. Department of Mathematics and Statistics, La Trobe University, Melbourne, Victoria, Australia
5. Global Health and Genomics, School of Medical Sciences and Health, Edith Cowan University, Perth, Western Australia, Australia