57.
https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=National+Narcotics+Laboratory+Beijing+Regional+Center[Affiliation]&datetype=edat&usehistory=y&retmax=25&tool=RemsenMedia&email=hello@remsenmedia.com&api_key=81853a771c3a3a2c6b2553a65bc33b056f0857.
https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&WebEnv=MCID_67957a1b1898e68d3e0329b5&query_key=1&retmode=xml&retmax=25&tool=RemsenMedia&email=hello@remsenmedia.com&api_key=81853a771c3a3a2c6b2553a65bc33b056f08