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Contributors AS-D, BM, MCO-J and RPV performed the experiments and analysed the data. RPV designed the study. RMM, FMC-C and RPV wrote and reviewed the manuscript.
Funding São Paulo Research Foundation (FAPESP). 2012/15165-2, 2014/14604-8, 2014/23196-0.
Competing interests None declared.
Ethics approval This study was approved by the local Ethical Committee from Nove de Julho University, under registration number 43554415.4.0000.5511.
Provenance and peer review Not commissioned; externally peer reviewed.