Umbehr, Martin H.
Bachmann, Lucas M.
Poyet, Cedric
Hammerer, Peter
Steurer, Johann
Puhan, Milo A.
Frei, Anja
Article History
Received: 19 July 2017
Accepted: 5 February 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: The local Ethical Committee of the Canton of Zurich approved the study and informed consent has been obtained by all patients.
: No data of an individual patients included in this study are contained in this manuscript, hence, no consent for publication must be obtained.
: The author and the co-authors declare that they have no competing interests.
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