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Stuck, Andreas E; Kharicha, Kalpa; Dapp, Ulrike; Anders, Jennifer; von Renteln-Kruse, Wolfgang; Meier-Baumgartner, Hans Peter; Iliffe, Steve; Harari, Danielle; Bachmann, Martin D; Egger, Matthias; Gillmann, Gerhard; Beck, John C; Swift, Cameron G (2007). The PRO-AGE study: an international randomised controlled study of health risk appraisal for older persons based in general practice. BMC Medical research methodology, 7, p. 2. London: BioMed Central 10.1186/1471-2288-7-2
