About the Authors

Jay P. Singh

Affiliations Psychiatric/Psychological Service, Department of Justice, Zürich, Switzerland, Faculty of Health Sciences, Molde University College, Molde, Norway

Martin Grann

Affiliation Centre for Violence Prevention, Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden

Seena Fazel


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

Competing Interests

All authors are occasionally hired as experts for giving talks or workshops about risk assessment. Typically, this is done as part of the authors' regular university duties (e.g. teaching students) but depending on the nature of the task and constituents, such activities are sometimes commissioned with remuneration extraneous to their academic salaries. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JS MG SF. Performed the experiments: JS MG SF. Analyzed the data: JS. Contributed reagents/materials/analysis tools: JS MG SF. Wrote the paper: JS MG SF.