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Rüegsegger N, Ahmad SS, Benneker LM, Berlemann U, Keel MJ, Hoppe S.Rüegsegger N, et al. Among authors: ahmad ss.Spine (Phila Pa 1976). 2016 Mar;41(6):538-48. doi: 10.1097/BRS.0000000000001261.Spine (Phila Pa 1976). 2016.PMID: 26536434Free article.
Held M, Engelmann E, Dunn R, Ahmad SS, Laubscher M, Keel MJB, Maqungo S, Hoppe S.Held M, et al. Among authors: ahmad ss.Orthop Traumatol Surg Res. 2017 Sep;103(5):801-807. doi: 10.1016/j.otsr.2017.05.002. Epub 2017 May 22.Orthop Traumatol Surg Res. 2017.PMID: 28546049Free article.Review.
Hoppe S, Aghayev E, Ahmad S, Keel MJB, Ecker TM, Deml M, Benneker LM.Hoppe S, et al.Global Spine J. 2017 Jun;7(4):317-324. doi: 10.1177/2192568217699185. Epub 2017 Apr 7.Global Spine J. 2017.PMID: 28815159Free PMC article.
Held M, Castelein S, Bruins MF, Laubscher M, Dunn R, Keel M, Ahmad S, Hoppe S.Held M, et al.Global Spine J. 2018 Feb;8(1):84-94. doi: 10.1177/2192568217707182. Epub 2017 Jun 2.Global Spine J. 2018.PMID: 29456919Free PMC article.Review.
Albers CE, Schott PM, Ahmad SS, Benneker LM, Nieuwkamp N, Hoppe S.Albers CE, et al. Among authors: ahmad ss.Global Spine J. 2019 Aug;9(5):499-504. doi: 10.1177/2192568218803106. Epub 2018 Oct 15.Global Spine J. 2019.PMID: 31431872Free PMC article.