Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22092159.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22092159/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/22092159
subscription/membership/fee required Wiley https://doi.org/10.1111/j.1398-9995.2011.02750.x