Table 1.
Inclusion and Exclusion Criteria for All Patients.
| Inclusion Criteria | Written Informed Consent |
| Positive RT-PCR 1 test of nasopharyngeal swab for COVID- 19, and pneumonia confirmed by a CT 2. | |
| Negative RT-PCR test of nasopharyngeal swab for COVID- 19, but radiological and biochemical examinations unambiguously suggest COVID-19, when other possible diagnoses have been excluded. | |
| Exclusion Criteria | Patients who are pregnant |
| History of heparin and associated drug allergies |
1 RT-PCR: Reserve Transcriptase-Polymerase Chain Reaction; 2 CT: Computerized Tomography.