© 2019 Crown copyright. Clinical and Experimental Immunology © 2019 British Society for Immunology. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland.  This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Except where otherwise noted, this item's license is described as © 2019 Crown copyright. Clinical and Experimental Immunology © 2019 British Society for Immunology. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.