1. Internal Medicine Department, La Paz University Hospital, Madrid, Spain;
2. Endocrinology Department, La Paz University Hospital, Madrid, Spain;
3. Microbiology Department, Head of the Serology, Molecular Biology Laboratory, La Paz University Hospital, Madrid, Spain;
4. Radiology Department, La Paz University Hospital, Madrid, Spain;
5. Universidad Autónoma de Madrid, Madrid, Spain;
6. Hematology Department, La Paz University Hospital, Madrid, Spain;
7. High Level Isolation Unit, Tropical and Travel Medicine National Referral Unit, Clinical COVID-19 Team, La Paz University Hospital, Madrid, Spain