Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31096305.ui
subscription/membership/fee required Georg Thieme Verlag Stuttgart, New York https://www.thieme-connect.com/DOI/DOI?10.1055/s-0039-1687908