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Ryöppy S, Poussa M, Heiskanen O, Leijala M, Peltola K.Ryöppy S, et al.J Bone Joint Surg Am. 1990 Sep;72(8):1245-9.J Bone Joint Surg Am. 1990.PMID: 2398095No abstract available.
Vaara P, Peltonen J, Poussa M, Merikanto J, Nurminen M, Kaitila I, Ryöppy S.Vaara P, et al. Among authors: ryoppy s.J Bone Joint Surg Br. 1998 Mar;80(2):315-20. doi: 10.1302/0301-620x.80b2.8329.J Bone Joint Surg Br. 1998.PMID: 9546468
Poussa M, Merikanto J, Ryöppy S, Marttinen E, Kaitila I.Poussa M, et al. Among authors: ryoppy s.Spine (Phila Pa 1976). 1991 Aug;16(8):881-7. doi: 10.1097/00007632-199108000-00005.Spine (Phila Pa 1976). 1991.PMID: 1948373