About the Authors

Gindo Tampubolon

tampubolon@manchester.ac.uk

Affiliation Cathie Marsh Institute for Social Research, University of Manchester, Manchester, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GT. Performed the experiments: GT. Analyzed the data: GT. Contributed reagents/materials/analysis tools: GT. Wrote the paper: GT.