Article History
Received: 13 March 2018
Accepted: 5 May 2018
First Online: 18 May 2018
Compliance with ethical standards
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: JLV has no conflicts of interest to declare. FM is the managing director of MiCo, a Swiss consulting firm specialized in medical e-nnovations. BS collaborates with Pulsion Medical Systems (Feldkirchen, Germany) as a member of the medical advisory board and has received honoraria for giving lectures and refunds of travel expenses from Pulsion Medical Systems. He has received institutional research grants, unrestricted research grants, and refunds of travel expenses from Tensys Medical (San Diego, CA, USA). He has also received honoraria for giving lectures and refunds of travel expenses from CNSystems Medizintechnik (Graz, Austria). He has received research support from Edwards Lifesciences (Irvine, CA, USA).