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Powell M, Kitchen N.Powell M, et al.Neurosurgery. 2007 Nov;61(5):1077-90; discussion 1090. doi: 10.1227/01.neu.0000303204.07866.d6.Neurosurgery. 2007.PMID: 18091284
McEvoy A, Smith M, Kitchen N, Powell M.McEvoy A, et al. Among authors: powell m.BMJ. 1996 Jun 29;312(7047):1671-2. doi: 10.1136/bmj.312.7047.1671c.BMJ. 1996.PMID: 8664741Free PMC article.No abstract available.