Symptoms of depression and insomnia in older age: A within-individual analysis over 20 years.

"CONFLICT OF INTEREST All authors have no conflicts of interest to declare related to this study."

"Funding information These specific analyses received no specific grant from any funding agency, commercial, or not‐for‐profit sectors. The Longitudinal Aging Study Amsterdam is supported by a grant from the Netherlands Ministry of Health Welfare and Sports, Directorate of Long‐Term Care. The data collection in 2012–2013 and 2013–2014 was financially supported by the Netherlands Organization for Scientific Research (NWO) in the framework of the project “New cohorts of young old in 21st century” (file number 480–10‐014). Annelies Brouwer is supported by a European Foundation for the Study of Diabetes (EFSD)/Lilly Mental Health award 2012 (to Marijke A. Bremmer)."