1. A Frail Health Care System for an Old Population: Lesson form the COVID-19 Outbreak in Italy;Volpato;J Gerontol A Biol Sci Med Sci,2020
2. Clinical Characteristics of Patients With Coronavirus Disease 2019 (COVID-19) Receiving Emergency Medical Services in King County;Yang;JAMA Netw Open,2020
3. Incidence, clinical characteristics and prognostic factor of patients with COVID-19: a systematic review and meta-analysis Running title: Predictors of clinical prognosis of COVID-19;Zhao,2020
4. Clinical Characteristics of Elderly Patients with COVID-19 in Hunan Province, China: A Multicenter, Retrospective Study;Guo;Gerontology,2020
5. Self-reported symptoms of SARS-CoV-2 infection in a non-hospitalized population: results from the large Italian web-based EPICOVID19 cross-sectional survey;Adorni,2020