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Kelton KA, Perk S, Loveland S, Perez-Nieves M, Fu H, Peng X.Kelton KA, et al.J Med Econ. 2017 May;20(5):533-540. doi: 10.1080/13696998.2017.1288126. Epub 2017 Feb 16.J Med Econ. 2017.PMID: 28133990Free article.