Name Info Provider Link
free resource Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/AZPH230
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18578830.ui
free resource Wiley https://onlinelibrary.wiley.com/doi/10.1111/j.1753-6405.2008.00230.x