PMC:7529504 / 18888-19089
Annnotations
{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7529504","sourcedb":"PMC","sourceid":"7529504","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7529504","text":"ion, participation in this study was voluntary and may have been skewed because responding physicians are willing to share information while nonresponding physicians may not be willing or able to do so","tracks":[]}