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Heinemann-Knoch M, Korte E, Heusinger J, Klünder M, Knoch T.Heinemann-Knoch M, et al. Among authors: heusinger j.Z Gerontol Geriatr. 2005 Feb;38(1):40-6. doi: 10.1007/s00391-005-0222-0.Z Gerontol Geriatr. 2005.PMID: 15756486German.