About the Authors
- David Frigola
- Laura Casanellas
- José M. Sancho
- Marta Ibañes
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* E-mail: mibanes@ub.edu
Affiliation Department of Estructura i Constituents de la Matèria, Facultat de Fsica, Universitat de Barcelona, Barcelona, Spain
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: MI. Performed the experiments: DF LC. Analyzed the data: DF LC JMS MI. Contributed reagents/materials/analysis tools: DF. Wrote the paper: DF JMS MI.