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Ellis RP, Manning WG.Ellis RP, et al.J Health Econ. 2007 Dec 1;26(6):1128-50. doi: 10.1016/j.jhealeco.2007.09.002. Epub 2007 Oct 2.J Health Econ. 2007.PMID: 17997176
Shen Y, Ellis RP.Shen Y, et al. Among authors: ellis rp.J Health Econ. 2002 May;21(3):515-30. doi: 10.1016/s0167-6296(02)00005-x.J Health Econ. 2002.PMID: 12022271