Martínez-Guajardo, Gerardo
Luis Cabellos, José
Díaz-Celaya, Andres
Pan, Sudip
Islas, Rafael
Chattaraj, Pratim K.
Heine, Thomas
Merino, Gabriel
Article History
Received: 3 February 2015
Accepted: 15 May 2015
First Online: 22 June 2015
Competing interests
: The authors declare no competing financial interests.