PMC:7079563 / 4411-4508 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7079563","sourcedb":"PMC","sourceid":"7079563","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7079563","text":"period from the end of December 2019 to January 2020 was the “Spring Festival travel rush” time i","tracks":[]}