Reviewed:

<bibtex>
    @MISC{ R-HSA-1280218.8,
           author          = {Trowsdale, J, Bluestone, JA, Elliott, T, Esensten, J, Heemskerk, JW},
           title           = {Adaptive Immune System},
           crossref        = {Reactome:R-HSA-1280218.8},
           howpublished    = {\url{http://www.reactome.org/PathwayBrowser/#R-HSA-1280218.8}},
           note            = {Reactome Pathway Knowledgebase, http://www.reactome.org/},
           month           = {May},
           year            = {2011},
           }
</bibtex>