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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
Hägg O, Fritzell P, Romberg K, Nordwall A.Hägg O, et al. Among authors: fritzell p.Eur Spine J. 2001 Jun;10(3):203-10. doi: 10.1007/s005860000221.Eur Spine J. 2001.PMID: 11469730Free PMC article.Clinical Trial.
Fritzell P, Hägg O, Wessberg P, Nordwall A; Swedish Lumbar Spine Study Group.Fritzell P, et al.Spine (Phila Pa 1976). 2001 Dec 1;26(23):2521-32; discussion 2532-4. doi: 10.1097/00007632-200112010-00002.Spine (Phila Pa 1976). 2001.PMID: 11725230Clinical Trial.
Fritzell P, Hägg O, Wessberg P, Nordwall A; Swedish Lumbar Spine Study Group.Fritzell P, et al.Spine (Phila Pa 1976). 2002 Jun 1;27(11):1131-41. doi: 10.1097/00007632-200206010-00002.Spine (Phila Pa 1976). 2002.PMID: 12045508Clinical Trial.
Hägg O, Fritzell P, Odén A, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al. Among authors: fritzell p.Spine (Phila Pa 1976). 2002 Jun 1;27(11):1213-22. doi: 10.1097/00007632-200206010-00014.Spine (Phila Pa 1976). 2002.PMID: 12045520
Hägg O, Fritzell P, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al. Among authors: fritzell p.Spine (Phila Pa 1976). 2002 Jun 1;27(11):1223-31. doi: 10.1097/00007632-200206010-00015.Spine (Phila Pa 1976). 2002.PMID: 12045521Clinical Trial.
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.