Article History
Received: 13 August 2018
Accepted: 25 August 2018
First Online: 29 August 2018
Compliance with ethical standards
:
: HC receives honorariums and travel expenses from Roche Products Limited, Pfizer Inc. and Baxter Healthcare; no other relationships or activities exist for all other authors that could appear to have influenced the submitted work.
: No ethical approval was required for this retrospective study.