Kramer, Andrew A.
Higgins, Thomas L.
Zimmerman, Jack E.
Article History
Received: 30 October 2015
Accepted: 10 November 2015
First Online: 24 November 2015
Compliance with ethical standards
: All human and animal studies have been approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: None.
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