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Johnston DA, Knight AM, Naylor BA, Wedderburn N, Mitchell GH.Johnston DA, et al. Among authors: naylor ba.J Immunol Methods. 1990 Mar 9;127(2):187-95. doi: 10.1016/0022-1759(90)90068-7.J Immunol Methods. 1990.PMID: 2155967Free PMC article.