About the Authors

Cormac Doyle

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Writing – original draft, Writing – review & editing

Cormacdoyle@nhs.net

Affiliation Department of Medicine, Gilbert Bain Hospital, Lerwick, Shetland, United Kingdom

Chris Isles

Roles Conceptualization, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Medicine, Dumfries and Galloway Royal Infirmary, Dumfries, United Kingdom

Pauline Wilson

Roles Conceptualization, Funding acquisition, Supervision, Writing – review & editing

Affiliation Department of Medicine, Gilbert Bain Hospital, Lerwick, Shetland, United Kingdom

Competing Interests

All authors have completed the ICMJE uniform disclosure form at www.icmje.org/coi_disclosure.pdf and declare: no support from any organisation for the submitted work; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work. This does not alter our adherence to PLOS ONE policies on sharing data and materials.