COVID-19 1 Clinical notes 1 Clinical research 1 Coronavirus 1 Coronaviruses 1 Diagnosis 1 Electronic Health Records 1 Electronic health records 1 Humans 1 Iterative methods 1 Keyword search Metathesaurus 1 Natural Language Processing 1 Natural Language Processing Tools 1 Natural language processing 1 Natural language processing systems 1 Outcome 1 Outcomes 1 Patient treatment 1 Prognose 1 Prognosis 1 Prospective Studies 1 Records management 1 SARS 1 SARS-CoV-2 1 Search engines 1 Semantic types 1 Semantics 1 Unified medical language systems 1 electronic health record 1