Billy, Helmuth
Surve, Amit
Fairley, Ryan
Cottam, Daniel http://orcid.org/0000-0001-8830-0291
Cottam, Austin
Zaveri, Hinali
Cottam, Samuel
Article History
First Online: 24 September 2018
Compliance with Ethical Standards
:
: Daniel Cottam, the corresponding author reports personal fees and other from Medtronic, outside the submitted work.All other authors have no conflicts of interest to declare.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.Since this is a retrospective study: formal consent is not required for this type of study.