PMC:7305584 / 3885-4060 JSONTXT

{"target":"http://pubannotation.org/docs/sourcedb/PMC/sourceid/7305584","sourcedb":"PMC","sourceid":"7305584","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7305584","text":"This retrospective study was approved by the Institutional Review Board of our hospital. The requirement to obtain informed consent was waived due to its retrospective nature.","tracks":[]}