“…Totally 42 articles used NLP tools including Apache cTAKES, MetaMap, Moonstone, MTERMS, BioMedICUS, MediClass, and LEO [ 14 - 16 , 20 , 22 , 26 , 31 - 35 , 38 , 40 - 42 , 43 , 45 , 46 , 48 , 51 , 59 , 61 , 62 , 68 , 69 , 71 , 73 , 74 , 76 - 81 , 83 , 84 , 86 , 87 , 90 , 94 , 95 ]. Apache cTAKES was developed on the UIMA platform and Apache openNLP toolkit and is one of the most popular NLP tools for clinical IE from EHR data [ 96 ].…”