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Hägg O, Fritzell P, Odén A, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al.Spine (Phila Pa 1976). 2002 Jun 1;27(11):1213-22. doi: 10.1097/00007632-200206010-00014.Spine (Phila Pa 1976). 2002.PMID: 12045520
Fritzell P, Hägg O, Wessberg P, Nordwall A; Swedish Lumbar Spine Study Group.Fritzell P, et al. Among authors: hagg o.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, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al.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.
Fritzell P, Hägg O, Nordwall A; Swedish Lumbar Spine Study Group.Fritzell P, et al. Among authors: hagg o.Eur Spine J. 2003 Apr;12(2):178-89. doi: 10.1007/s00586-002-0493-8. Epub 2003 Feb 14.Eur Spine J. 2003.PMID: 12709856Free PMC article.Clinical Trial.
Fritzell P, Hägg O, Jonsson D, Nordwall A; Swedish Lumbar Spine Study Group.Fritzell P, et al. Among authors: hagg o.Spine (Phila Pa 1976). 2004 Feb 15;29(4):421-34; discussion Z3. doi: 10.1097/01.brs.0000102681.61791.12.Spine (Phila Pa 1976). 2004.PMID: 15094539Clinical Trial.
Hägg O, Fritzell P.Hägg O, et al.Spine (Phila Pa 1976). 2004 May 15;29(10):1160-1. doi: 10.1097/00007632-200405150-00024.Spine (Phila Pa 1976). 2004.PMID: 15131448No abstract available.
Hägg O, Fritzell P, Nordwall A; Swedish Lumbar Spine Study Group.Hägg O, et al.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.
Hedlund R, Johansson C, Hägg O, Fritzell P, Tullberg T; Swedish Lumbar Spine Study Group.Hedlund R, et al. Among authors: hagg o.Spine J. 2016 May;16(5):579-87. doi: 10.1016/j.spinee.2015.08.065. Epub 2015 Sep 9.Spine J. 2016.PMID: 26363250Clinical Trial.
Jonsson E, Olafsson G, Fritzell P, Hägg O, Borgström F.Jonsson E, et al. Among authors: hagg o.Spine (Phila Pa 1976). 2017 Sep 1;42(17):1302-1310. doi: 10.1097/BRS.0000000000002089.Spine (Phila Pa 1976). 2017.PMID: 28832440
Hansson-Hedblom A, Jonsson E, Fritzell P, Hägg O, Borgström F.Hansson-Hedblom A, et al. Among authors: hagg o.Spine (Phila Pa 1976). 2019 Sep;44(18):1309-1317. doi: 10.1097/BRS.0000000000003050.Spine (Phila Pa 1976). 2019.PMID: 30985570