COVID-19(15) Patient(13) Result(11) Infection(9) risk(8) SARS-CoV-2(7) lung(6) association(6) smoking(6) ICU(6) positive(6) Care(5) severity(5) Health(5) Radiographic(5) predictor(5) effective(5) COVID-19 patient(5) Critical(5) pandemic(5) Treatment(5) outcome(5) pulmonary(4) sensitivity(4) patients(4) finding(4) increase in(4) study period(4) Diagnosis(4) diagnosed(4)