Mateus, H. M.
Barba-Ortega, J.
Joya, M. R.
Article History
Received: 29 September 2017
Accepted: 2 January 2018
First Online: 15 January 2018
Compliance with ethical standards
:
: That we have not signed an agreement with any sponsor of the research reported in the Contribution that prevents you from publishing both positive and negative results or that forbids you from publishing this research without the prior approval of the sponsor.