To my parents, Anselmo and Isabel; my brothers, Alvaro, Daniel, and Ignacio; and Viviana. They all are a source of energy and motivation in everything I do.
Gonzalo
To my daughter Maria Elizabeth, who was born at the time I started writing this book she is the sunshine of my life; my wife Jelena, who provided me with all the support and love I needed; my parents, José and Mari-Luz, my aunt Feli, my brother Javier José who, through the distance, encouraged and supported me during this project.
Miguel Angel
