PMC:7543426 / 680-704 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7543426","sourcedb":"PMC","sourceid":"7543426","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7543426","text":"es and 4 without comorbi","tracks":[]}