Table of Contents

Original Research

Page 05-12
Carlos Samaniego, Ariovaldo Denis Granja, Flavio Picchi
Page 15-22
Angélica del Valle, José Pérez, Andrés Torres, Miguel Martínez
Page 23-30
E. Pellicer, O. Garzón, J. Catalá, T. Pellicer
Page 33-40
Jorge Manuel Caliço Lopes de Brito, Ana Paula Gonçalves, José Roberto dos Santos
Page 43-56
Alfredo Serpell, Ximena Ferrada
Page 57-70
Renato Vargas Salazar, Rodrigo Sciaraffia Pérez