Escobar, D
Hepp, M I
Farkas, C
Campos, T
Sodir, N M
Morales, M
Álvarez, C I
Swigart, L
Evan, G I
Gutiérrez, J L
Nishinakamura, R
Castro, A F
Pincheira, R
Article History
Received: 27 January 2015
Revised: 13 May 2015
Accepted: 15 May 2015
First Online: 16 July 2015
Competing interests
: The authors declare no conflict of interest.