COVID-19(7) Prevalence(6) Saudi Arabia(6) 95% CI(5) Patient(5) hepatitis B(5) patients(5) severity(5) cirrhosis(4) Hepatitis B virus(4) lung infiltration(3) hospital(3) lung field(3) diarrhea(3) GI symptom(3) Hepatitis(3) PCR test(3) hospitalized COVID-19 patient(3) gastrointestinal manifestations(3) Chronic Hepatitis B(3) Mortality(3) syndrome(3) vomiting(3) outcome(3) conducted(3) Manifestations(3) association(3) manifestation(3) university hospital(3) single center(3)