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Liu L, Bopp MM, Roberson PK, Sullivan DH.Liu L, et al. Among authors: roberson pk.J Gerontol A Biol Sci Med Sci. 2002 Nov;57(11):M741-6. doi: 10.1093/gerona/57.11.m741.J Gerontol A Biol Sci Med Sci. 2002.PMID: 12403803
Sullivan DH, Johnson LE, Bopp MM, Roberson PK.Sullivan DH, et al. Among authors: roberson pk.J Gerontol A Biol Sci Med Sci. 2004 Jun;59(6):M633-9. doi: 10.1093/gerona/59.6.m633.J Gerontol A Biol Sci Med Sci. 2004.PMID: 15215284Clinical Trial.
Sullivan DH, Liu L, Roberson PK, Bopp MM, Rees JC.Sullivan DH, et al. Among authors: roberson pk.J Am Geriatr Soc. 2004 Oct;52(10):1696-701. doi: 10.1111/j.1532-5415.2004.52463.x.J Am Geriatr Soc. 2004.PMID: 15450047