Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1072-7515(18)32226-9
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30582976.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1016/j.jamcollsurg.2018.12.002