AUTHOR=Land Walter G., Messmer Konrad TITLE=The danger theory in view of the injury hypothesis: 20 years later JOURNAL=Frontiers in Immunology VOLUME=3 YEAR=2012 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2012.00349 DOI=10.3389/fimmu.2012.00349 ISSN=1664-3224