About the Authors

Corresponding Author

fontaineo@who.int

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

OF led and co-ordinated the study. OF and IR designed the study and wrote the first draft of the paper. KYC, ACT, and IR computed the intermediate and final scores and agreement statistics. MK, SB, CB-P, CD, HM, HR, NCR, MAS, MS, JDS, and BV submitted their scores to OF, checked the first draft for important intellectual content, and provided many valuable comments.