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Probst CA, Shaffer VA, Chan YR.Probst CA, et al. Among authors: shaffer va.Health Psychol. 2013 Sep;32(9):995-1002. doi: 10.1037/a0032925.Health Psychol. 2013.PMID: 24001250
Merkle EC, Shaffer VA.Merkle EC, et al. Among authors: shaffer va.Br J Math Stat Psychol. 2011 Feb;64(Pt 1):161-81. doi: 10.1348/000711010X503129.Br J Math Stat Psychol. 2011.PMID: 21506949
Shaffer VA, Merkle EC, Fagerlin A, Griggs JJ, Langa KM, Iwashyna TJ.Shaffer VA, et al.Med Care. 2012 Oct;50(10):849-55. doi: 10.1097/MLR.0b013e31825a8bb0.Med Care. 2012.PMID: 22683591Free PMC article.