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Butler RJ, Johnson WG, Gray BP.Butler RJ, et al. Among authors: johnson wg.Prof Case Manag. 2007 Nov-Dec;12(6):316-27; quiz 328-9. doi: 10.1097/01.PCAMA.0000300404.07948.86.Prof Case Manag. 2007.PMID: 18030151
Butler RJ, Johnson WG, Côté P.Butler RJ, et al. Among authors: johnson wg.J Occup Environ Med. 2007 Feb;49(2):214-25. doi: 10.1097/jom.0b013e318032211d.J Occup Environ Med. 2007.PMID: 17293761
Butler RJ, Johnson WG.Butler RJ, et al. Among authors: johnson wg.Spine J. 2008 May-Jun;8(3):510-21. doi: 10.1016/j.spinee.2007.04.006. Epub 2007 May 25.Spine J. 2008.PMID: 17602887
Baldwin ML, Butler RJ, Johnson WG, Côté P.Baldwin ML, et al. Among authors: johnson wg.J Occup Rehabil. 2007 Dec;17(4):683-700. doi: 10.1007/s10926-007-9102-3. Epub 2007 Oct 24.J Occup Rehabil. 2007.PMID: 17957451
Côté P, Baldwin ML, Johnson WG, Frank JW, Butler RJ.Côté P, et al. Among authors: johnson wg.Eur Spine J. 2008 Apr;17(4):484-93. doi: 10.1007/s00586-007-0577-6. Epub 2008 Jan 23.Eur Spine J. 2008.PMID: 18214554Free PMC article.
Butler RJ, Wilson BL, Johnson WG.Butler RJ, et al. Among authors: johnson wg.Health Econ. 2012 Feb;21(2):113-26. doi: 10.1002/hec.1699. Epub 2010 Dec 15.Health Econ. 2012.PMID: 22223556
Butler RJ, Johnson WG.Butler RJ, et al. Among authors: johnson wg.Int J Health Econ Manag. 2016 Sep;16(3):269-283. doi: 10.1007/s10754-016-9190-8. Epub 2016 May 9.Int J Health Econ Manag. 2016.PMID: 27878677
Baldwin ML, Johnson WG, Butler RJ.Baldwin ML, et al. Among authors: johnson wg.Am J Ind Med. 1996 Jun;29(6):632-41. doi: 10.1002/(SICI)1097-0274(199606)29:6<632::AID-AJIM7>3.0.CO;2-L.Am J Ind Med. 1996.PMID: 8773723