1. Department of Old Age Psychiatry Institute of Psychiatry Psychology and Neuroscience, King's College London London UK
2. Division of Psychiatry Departments of Internal Medicine China Medical University Beigang Hospital Yunlin Taiwan
3. Sleep Medicine Center and Mind‐Body Interface Laboratory (MBI‐Lab) China Medical University Hospital Taichung Taiwan
4. University Hospital of Old Age Psychiatry, University of Bern Bern Switzerland
5. Centre for Age‐Related Medicine Stavanger University Hospital Stavanger Norway
6. National Institute for Health Research (NIHR) Maudsley Biomedical Research Centre (BRC) at South London and Maudsley NHS Foundation Trust London UK