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Sin TK, Tam BT, Yu AP, Yip SP, Yung BY, Chan LW, Wong CS, Rudd JA, Siu PM.Sin TK, et al. Among authors: siu pm.J Gerontol A Biol Sci Med Sci. 2016 Jun;71(6):730-9. doi: 10.1093/gerona/glv175. Epub 2015 Oct 8.J Gerontol A Biol Sci Med Sci. 2016.PMID: 26450947Free PMC article.