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Karppinen J, Ohinmaa A, Malmivaara A, Kurunlahti M, Kyllönen E, Pienimäki T, Nieminen P, Tervonen O, Vanharanta H.Karppinen J, et al. Among authors: vanharanta h.Spine (Phila Pa 1976). 2001 Dec 1;26(23):2587-95. doi: 10.1097/00007632-200112010-00013.Spine (Phila Pa 1976). 2001.PMID: 11725240Clinical Trial.
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Karppinen J, Mikkonen P, Kurunlahti M, Tervonen O, Paldanius M, Vasari P, Saikku P, Vanharanta H.Karppinen J, et al. Among authors: vanharanta h.Spine (Phila Pa 1976). 2003 Aug 1;28(15):E284-9. doi: 10.1097/01.BRS.0000083229.42276.A0.Spine (Phila Pa 1976). 2003.PMID: 12897506
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Kurunlahti M, Karppinen J, Haapea M, Niinimäki J, Autio R, Vanharanta H, Suramo I, Tervonen O.Kurunlahti M, et al. Among authors: vanharanta h.Spine (Phila Pa 1976). 2004 Aug 15;29(16):1804-8; discussion 1809. doi: 10.1097/01.brs.0000134576.77709.64.Spine (Phila Pa 1976). 2004.PMID: 15303025
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