PMC:6194691 / 179883-179936 JSONTXT

{"target":"http://pubannotation.org/docs/sourcedb/PMC/sourceid/6194691","sourcedb":"PMC","sourceid":"6194691","source_url":"https://www.ncbi.nlm.nih.gov/pmc/6194691","text":"cClearance known to be large but difficult to measure","tracks":[]}