Article History
Received: 7 August 2019
Revised: 11 October 2019
Accepted: 14 October 2019
First Online: 27 February 2020
Compliance with ethical standards
: CSH is a consultant for Medtronic and Abbott and has received research funds from Medtronic. Informed consent, an ethical statement and human/animal rights considerations were not applicable given this was a review article.