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Röhrig G, Lindner R; AG Gerontopsychosomatik der Deutschen Gesellschaft für Geriatrie (DGG).Röhrig G, et al.Z Gerontol Geriatr. 2020 Aug;53(5):430-436. doi: 10.1007/s00391-019-01658-5. Epub 2019 Nov 13.Z Gerontol Geriatr. 2020.PMID: 31720831German.