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Dapp, Ulrike; Lorentz, Ch; Laub, S; Anders, J; von Renteln-Kruse, W; Minder, Ch; Dirksen-Fischer, M (2009). [Active and healthy living in old age--results from a representative survey of community-dwelling senior citizens in Hamburg]. Zeitschrift für Gerontologie und Geriatrie, 42(3), pp. 245-255. Darmstadt: Springer 10.1007/s00391-009-0040-x
