About the Authors

Michael N. Bates

m_bates@berkeley.edu

Affiliation School of Public Health, University of California, Berkeley, California, United States of America

Julian Crane

Affiliation School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand

John R. Balmes

Affiliation School of Public Health, University of California, Berkeley, California, United States of America

Nick Garrett

Affiliation Faculty of Health, Auckland University of Technology, Auckland, New Zealand

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MNB JC JRB NG. Performed the experiments: MNB JC JRB NG. Analyzed the data: MNB NG. Wrote the paper: MNB JC JRB NG. Revision of manuscript: MNB JC JRB NG.