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Omair A, Mannion AF, Holden M, Fairbank J, Lie BA, Hägg O, Fritzell P, Brox JI.Omair A, et al. Among authors: fritzell p.Eur Spine J. 2015 Nov;24(11):2425-31. doi: 10.1007/s00586-015-3866-5. Epub 2015 Mar 14.Eur Spine J. 2015.PMID: 25772090
Hägg O, Fritzell P, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al. Among authors: fritzell p.Eur Spine J. 2006 May;15(5):677-82. doi: 10.1007/s00586-005-1017-0. Epub 2005 Sep 7.Eur Spine J. 2006.PMID: 16151715Free PMC article.
Mannion AF, Leivseth G, Brox JI, Fritzell P, Hägg O, Fairbank JC.Mannion AF, et al. Among authors: fritzell p.Spine (Phila Pa 1976). 2014 Aug 1;39(17):1373-83. doi: 10.1097/BRS.0000000000000437.Spine (Phila Pa 1976). 2014.PMID: 24859589Clinical Trial.
Omair A, Mannion AF, Holden M, Leivseth G, Fairbank J, Hägg O, Fritzell P, Brox JI.Omair A, et al. Among authors: fritzell p.Eur Spine J. 2016 Jan;25(1):2-13. doi: 10.1007/s00586-015-4181-x. Epub 2015 Aug 18.Eur Spine J. 2016.PMID: 26281980
Jonsson E, Olafsson G, Fritzell P, Hägg O, Borgström F.Jonsson E, et al. Among authors: fritzell p.Spine (Phila Pa 1976). 2017 Sep 1;42(17):1302-1310. doi: 10.1097/BRS.0000000000002089.Spine (Phila Pa 1976). 2017.PMID: 28832440
Olafsson G, Jonsson E, Fritzell P, Hägg O, Borgström F.Olafsson G, et al. Among authors: fritzell p.Eur Spine J. 2018 Nov;27(11):2875-2881. doi: 10.1007/s00586-018-5742-6. Epub 2018 Aug 28.Eur Spine J. 2018.PMID: 30155730
Hägg O, Fritzell P, Hedlund R, Möller H, Ekselius L, Nordwall A; Swedish Lumbar Spine Study.Hägg O, et al. Among authors: fritzell p.Eur Spine J. 2003 Feb;12(1):2-11. doi: 10.1007/s00586-002-0427-5. Epub 2002 Jun 21.Eur Spine J. 2003.PMID: 12592541Clinical Trial.
Hägg O, Fritzell P, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al. Among authors: fritzell p.Eur Spine J. 2003 Feb;12(1):12-20. doi: 10.1007/s00586-002-0464-0. Epub 2002 Oct 24.Eur Spine J. 2003.PMID: 12592542Clinical Trial.
Hägg O, Fritzell P, Ekselius L, Nordwall A; Swedish Lumbar Spine Study.Hägg O, et al. Among authors: fritzell p.Eur Spine J. 2003 Feb;12(1):22-33. doi: 10.1007/s00586-002-0465-z. Epub 2002 Oct 23.Eur Spine J. 2003.PMID: 12592544Clinical Trial.
Mannion AF, Pittet V, Steiger F, Vader JP, Becker HJ, Porchet F; Zürich Appropriateness of Spine Surgery (ZASS) Group.Mannion AF, et al.Eur Spine J. 2014 Sep;23(9):1903-17. doi: 10.1007/s00586-014-3284-0. Epub 2014 Apr 24.Eur Spine J. 2014.PMID: 24760463Review.