Article History
Received: 20 December 2018
Revised: 6 March 2019
Accepted: 26 March 2019
First Online: 4 April 2019
Compliance with ethical standards
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: Drs. Dillman and Trout receive research support from Canon Medical Systems and Siemens Medical Solutions. Dr. Trout receives authorship honoraria from Wolters Kluwer and Reed Elsevier.