COVID‐19(6) COVID‐19(4) Elderly patient(4) Patient(3) coronavirus disease(3) Diagnosis(3) COVID‐19 patient(3) elderly patients(3) Pneumonia(2) Clinical practice(2) Consensus(2) Mortality(2) World Health Organization(2) patients(2) susceptible(2) underlying diseases(2) Older(2) Novel coronavirus(2) literature review(2) Result(2) expert(2) age(2) disease(2) manifestation(2) Care(2) proportion(2) coagulation parameter(1) psychological support(1) changes in(1) IMPROVE(1)