Study characteristics
MULTIPLE MYELOMA, CHRONIC RENAL FAILURE, DISEASES
In 7 publications, the study population was patients with a positive PCR test for SARS-COV-2 in the hospital [Six studies had control groups [In one study, if patients started one treatment for Covid-19, they were excluded from the study [In one study, 9 out of 10 patients had different underlying diseases such as chronic renal failure, multiple myeloma, and arterial hypertension [