Reviewed:

<bibtex>
    @MISC{ R-HSA-3359474.4,
           author          = {Watkins, D},
           title           = {Defective MMACHC causes MAHCC},
           crossref        = {Reactome:R-HSA-3359474.4},
           howpublished    = {\url{http://www.reactome.org/PathwayBrowser/#R-HSA-3359474.4}},
           note            = {Reactome Pathway Knowledgebase, http://www.reactome.org/},
           month           = {August},
           year            = {2013},
           }
</bibtex>