About the Authors

Roderik F. Viergever

Affiliation Department of Research Policy and Cooperation (RPC), International Clinical Trials Registry Platform (ICTRP), World Health Organization (WHO), Geneva, Switzerland

Davina Ghersi

ghersid@who.int

Affiliation Department of Research Policy and Cooperation (RPC), International Clinical Trials Registry Platform (ICTRP), World Health Organization (WHO), Geneva, Switzerland

Competing Interests

DG is the Team Leader of the International Clinical Trial Registry Platform (ICTRP) of the World Health Organization. RV has no conflict of interest to report. 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: RFV DG. Performed the experiments: RFV. Analyzed the data: RFV DG. Wrote the paper: RFV DG.