About the Authors

PILL Collaborative Group

arodgers@georgeinstitute.org

For a list of members please see the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AR AP OB MB RG DG RJ BN JN NP NR PR SR ST SV. Performed the experiments: AR AP OB MB RG DG RJ BN JN NP NR PR SR ST SV. Analyzed the data: SV. Wrote the paper: AR AP OB MB RG DG RJ BN JN NP NR PR SR ST SV.