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Gems D, Riddle DL.Gems D, et al. Among authors: riddle dl.J Gerontol A Biol Sci Med Sci. 2000 May;55(5):B215-9. doi: 10.1093/gerona/55.5.b215.J Gerontol A Biol Sci Med Sci. 2000.PMID: 10819307
Grenache DG, Caldicott I, Albert PS, Riddle DL, Politz SM.Grenache DG, et al. Among authors: riddle dl.Proc Natl Acad Sci U S A. 1996 Oct 29;93(22):12388-93. doi: 10.1073/pnas.93.22.12388.Proc Natl Acad Sci U S A. 1996.PMID: 8901591Free PMC article.