About the Authors
Dental School, Faculty of Medicine, University of Glasgow, Glasgow, Scotland
Ninewells Hospital & Medical School, University of Dundee, Dundee, Scotland
Gardiner Institute, Faculty of Medicine, University of Glasgow, Glasgow, Scotland
The authors have declared that no competing interests exist.
ICMJE criteria for authorship read and met: ADM DIC TMM GTM. Wrote the first draft of the paper: ADM. Contributed to the writing of the paper: DIC TMM GTM.