About the Authors
- Claudia Stein, Tanja Kuchenmüller, Saskia Hendrickx, Annette Prüss-Űstün, Lara Wolfson, Dirk Engels, Jørgen Schlundt
- World Health Organization, Geneva, Switzerland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CS TK. Analyzed the data: SH CS TK. Wrote the paper: DE SH CS TK LW JS AP. Other: Performed the review CS.