About the Authors

Otto Simonsson

Roles Data curation, Formal analysis, Writing – original draft

otto.simonsson@ki.se

Affiliations Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden, Department of Sociology, University of Oxford, Oxford, United Kingdom

Stephen D. Fisher

Roles Supervision, Writing – review & editing

Affiliation Department of Sociology, University of Oxford, Oxford, United Kingdom

Competing Interests

The author(s) declared the following potential conflicts of interest with respect to the research, authorship and/or publication of this article: Otto Simonsson previously owned stock in Eudelics AB. Stephen Fisher has a very small number of shares in Deltapoll, but he does not consider this to be a significant conflict of interest. This does not alter our adherence to PLOS ONE policies on sharing data and materials. There are no patents, products in development or marketed products associated with this research to declare.