1. National Clinical Research Center of Geriatrics and Department of Geriatrics West China Hospital Sichuan University Chengdu China
2. Philadelphia College of Osteopathic Medicine Duluth Georgia USA
3. Department of Guideline and Rapid Recommendation Cochrane China Centre MAGIC China Centre Chinese Evidence‐Based Medicine Centre West China Hospital Sichuan University Chengdu China
4. Departments of Medicine, Biostatistics, and Epidemiology Johns Hopkins University Baltimore Maryland USA