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subscription/membership/fee required Atypon https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.119.044703?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
subscription/membership/fee required Ingenta plc https://www.ingentaconnect.com/openurl?genre=article&issn=0009-7322&volume=141&issue=24&spage=2031&aulast=Zhang
Steroids free resource MedlinePlus Health Information https://medlineplus.gov/steroids.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=32539614.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32539614/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/32539614