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Kalkan E, Keskin F, Kaya B, Esen H, Tosun M, Kalkan SS, Erdi F, Unlü A, Avunduk MC, Cicek O.Kalkan E, et al. Among authors: erdi f.Spinal Cord. 2011 Jan;49(1):81-6. doi: 10.1038/sc.2010.76. Epub 2010 Jun 29.Spinal Cord. 2011.PMID: 20585328
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Kalkan E, Torun F, Erdi F, Baysefer A.Kalkan E, et al. Among authors: erdi f.J Clin Neurosci. 2008 Apr;15(4):472-3. doi: 10.1016/j.jocn.2007.01.011. Epub 2008 Feb 6.J Clin Neurosci. 2008.PMID: 18258436
Güney O, Erdi F, Esen H, Kiyici A, Kocaogullar Y.Güney O, et al. Among authors: erdi f.World Neurosurg. 2010 Jan;73(1):42-9; discussion e3. doi: 10.1016/j.surneu.2009.06.003. Epub 2009 Aug 7.World Neurosurg. 2010.PMID: 20452867
Erayman I, Kalkan E, Erdi F, Kerimoglu Ü, Esen H.Erayman I, et al. Among authors: erdi f.Eur Spine J. 2011 Jul;20 Suppl 2(Suppl 2):S235-8. doi: 10.1007/s00586-010-1614-4. Epub 2010 Oct 31.Eur Spine J. 2011.PMID: 21069542Free PMC article.
Kocaogullar Y, Güney O, Kaya B, Erdi F.Kocaogullar Y, et al. Among authors: erdi f.Neurol Sci. 2011 Oct;32(5):949-52. doi: 10.1007/s10072-011-0722-1. Epub 2011 Aug 6.Neurol Sci. 2011.PMID: 21822695
Keskin F, Kalkan E, Erdi F.Keskin F, et al. Among authors: erdi f.J Korean Neurosurg Soc. 2013 Jan;53(1):49-51. doi: 10.3340/jkns.2013.53.1.49. Epub 2013 Jan 31.J Korean Neurosurg Soc. 2013.PMID: 23441058Free PMC article.
Erdi F, Kaya B, Keskin F, Koç O, Karatas Y, Kalkan E.Erdi F, et al.Vasc Endovascular Surg. 2014 Apr;48(3):256-8. doi: 10.1177/1538574413513848. Epub 2013 Dec 3.Vasc Endovascular Surg. 2014.PMID: 24302162
Keskin F, Erdi F, Kaya B, Poyraz N, Keskin S, Kalkan E, Ozbek O, Koc O.Keskin F, et al. Among authors: erdi f.Neurol Res. 2015 Apr;37(4):359-65. doi: 10.1179/1743132814Y.0000000450. Epub 2014 Oct 13.Neurol Res. 2015.PMID: 25310354Review.
Esen H, Erdi F, Kaya B, Feyzioglu B, Keskin F, Demir LS.Esen H, et al. Among authors: erdi f.J Neurooncol. 2015 Feb;121(3):451-8. doi: 10.1007/s11060-014-1661-5. Epub 2014 Nov 13.J Neurooncol. 2015.PMID: 25391969