Fernando Farfán Vagelis Hristidis Anand Ranganathan Michael Weiner XOntoRank: Ontology-Aware Search of Electronic Medical Records. 820-831 2009 ICDE http://doi.ieeecomputersociety.org/10.1109/ICDE.2009.73 conf/icde/2009 db/conf/icde/icde2009.html#FarfanHRW09