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Häkkinen K, Kraemer WJ, Kallinen M, Linnamo V, Pastinen UM, Newton RU.Häkkinen K, et al. Among authors: newton ru.J Gerontol A Biol Sci Med Sci. 1996 Jan;51(1):B21-9. doi: 10.1093/gerona/51a.1.b21.J Gerontol A Biol Sci Med Sci. 1996.PMID: 8548495