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Frederiks WM, Marx F.Frederiks WM, et al. Among authors: marx f.Histochem J. 1988 Apr;20(4):207-14. doi: 10.1007/BF01747465.Histochem J. 1988.PMID: 2850287
Frederiks WM, Marx F, Van Noorden CJ.Frederiks WM, et al. Among authors: marx f.Histochem J. 1987 Mar;19(3):150-6. doi: 10.1007/BF01695139.Histochem J. 1987.PMID: 2439479