About the Authors
- Guo Liu
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Affiliation College of Urban and Environmental Sciences, Peking University, Beijing, China
- Yi Yin
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Affiliation College of Urban and Environmental Sciences, Peking University, Beijing, China
- Hongyan Liu
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* E-mail: lhy@urban.pku.edu.cn
Affiliation College of Urban and Environmental Sciences, Peking University, Beijing, China
- Qian Hao
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Affiliation College of Urban and Environmental Sciences, Peking University, Beijing, China
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: HL. Performed the experiments: GL YY. Analyzed the data: GL YY QH. Contributed reagents/materials/analysis tools: GL YY QH. Wrote the paper: GL HL.