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Poussa M, Merikanto J, Ryöppy S, Marttinen E, Kaitila I.Poussa M, et al.Spine (Phila Pa 1976). 1991 Aug;16(8):881-7. doi: 10.1097/00007632-199108000-00005.Spine (Phila Pa 1976). 1991.PMID: 1948373
Remes V, Marttinen E, Poussa M, Kaitila I, Peltonen J.Remes V, et al.Spine (Phila Pa 1976). 1999 Oct 1;24(19):1990-5. doi: 10.1097/00007632-199910010-00005.Spine (Phila Pa 1976). 1999.PMID: 10528373