inclusion criteria: adult patient with covid-19 infections, admitted to: * an acute non-critical medical ward with admission d-dimer levels \>1,000ng/ml, or * an acute critical ward (icu, intermediate care unit)

inclusion criteria: adult patient with covid-19 infections, admitted to: * an acute non-critical medical ward with admission d-dimer levels \>1,000ng/ml, or * an acute critical ward (icu, intermediate care unit)

inclusion criteria: adult patient with covid-19 infections, admitted to: - an acute non-critical medical ward with admission d-dimer levels >1,000ng/ml, or - an acute critical ward (icu, intermediate care unit)

inclusion criteria: adult patient with covid-19 infections, admitted to: - an acute non-critical medical ward with admission d-dimer levels >1,000ng/ml, or - an acute critical ward (icu, intermediate care unit)