Observational study
Coronavirus disease 2019 (COVID-19)
Medicine
Meta-analysis
Diabetes mellitus
2019-20 coronavirus outbreak
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Risk factor
MEDLINE
Emergency medicine
Internal medicine
Intensive care medicine
Virology
Disease
Infectious disease (medical specialty)
Outbreak
Endocrinology
Political science
Law
