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Figure 4: © Roitt, I. et al. (1998) ‘Major lymphoid organs and tissues’, Immunology, 5th edn, Mosby Internation Ltd.
Figure 5: courtesy of Susan Van Noorden.
Section 1.6: © The Open University and its licensors https://creativecommons.org/licenses/by-nc-nd/4.0/
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Cambridge University, Department of Pathology
University of Leicester
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Milton Keynes Hospital, Department of Histopathology
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