Soares dos Santos, Marco P.
Ferreira, Jorge A. F.
Simões, José A. O.
Pascoal, Ricardo
Torrão, João
Xue, Xiaozheng
Furlani, Edward P.
Article History
Received: 3 August 2015
Accepted: 20 November 2015
First Online: 4 January 2016
Competing interests
: The authors declare no competing financial interests.