PMC:7283670 / 40290-40352 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7283670","sourcedb":"PMC","sourceid":"7283670","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7283670","text":"Retrospective cohort study/three tertiary hospitals of Wenzhou","tracks":[]}