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Whittaker MA, Carr NJ, Cripps N.Whittaker MA, et al. Among authors: carr nj.Postgrad Med J. 2001 Aug;77(910):532, 541-2. doi: 10.1136/pmj.77.910.532.Postgrad Med J. 2001.PMID: 11470939Free PMC article.No abstract available.