Financial & competing interests disclosure
David Smith is Professor in the Medical School at Keele University, UK and a Director of Trans Spectra Limited, UK. Patrik Španel is Research Scientist at the J. Heyrovsky Institute of Physical Chemistry, Czech Republic, Professor in the Medical School at Keele University, UK and a Director of Trans Spectra Limited, UK. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.