18.220.42.22=18.2<BR>https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=China;+Guizhou+Provincial+Engineering+Research+Center+for+Natural+Drugs[Affiliation]&datetype=edat&usehistory=y&retmax=25&tool=pubfacts&email=info@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908