Cuthbert, Matthew
Ripley, Nicholas
McMahon, John J.
Evans, Martin
Haff, G. Gregory
Comfort, Paul
Article History
First Online: 9 December 2019
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the preparation of this letter.
: Matthew Cuthbert, Nicholas Ripley, John McMahon, Martin Evans, G. Gregory Haff and Paul Comfort declare that they have no conflicts of interest relevant to the content of this letter.