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AMG and SA are the first authors.
Contributors AMG: study concept and design, analysis and interpretation of data, manuscript writing; SA: acquisition and analysis of data, manuscript writing; GK, IGC: acquisition and analysis of data; MC, RP, EM: critical revision of manuscript for intellectual content; MAK: study supervision, critical revision of manuscript for intellectual content; LS: analysis and interpretation of data, critical revision of manuscript for intellectual content; AI: study concept and design, study supervision, critical revision of manuscript for intellectual content.
Funding This work was partially supported by grants from National Scientific and Technical Research Council, CONICYT/FONDECYT Regular (1130920), FONCyT-PICT (grants 2012-0412 and 2012-1309), FONDAP 15150012 and INECO Foundation.
Competing interests None.
Ethics approval INECO Foundation.
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement Our data are fully original and available for sharing. No data from the study has been excluded from this manuscript.