Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1072-7515(05)00482-5
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16125067.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1016/j.jamcollsurg.2005.04.027