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Beall DP, Olan WJ, Kakad P, Li Q, Hornberger J.Beall DP, et al.Pain Physician. 2015 May-Jun;18(3):E299-306.Pain Physician. 2015.PMID: 26000677Free article.
Hirsch JA, Beall DP, Chambers MR, Andreshak TG, Brook AL, Bruel BM, Deen HG, Gerszten PC, Kreiner DS, Sansur CA, Tutton SM, van der Meer P, Stoevelaar HJ.Hirsch JA, et al. Among authors: beall dp.Spine J. 2018 Nov;18(11):2152-2161. doi: 10.1016/j.spinee.2018.07.025. Epub 2018 Aug 7.Spine J. 2018.PMID: 30096377Free article.