Ratto, C.
Article History
Received: 6 February 2018
Accepted: 7 February 2018
First Online: 22 February 2018
Compliance with ethical standards
:
: Carlo Ratto was, for 1 year, member of the THD Advisory Board; no personal salary was received.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: No informed consent was necessary for the study.