Dedication

To my wife, Carmen, and my daughters, Laura and Patricia; they are my life. My parents, Patricio and Mª Dolores, will live forever in the memory.

Patricio Salmerón Revuelta

Dedicated to my parents, Agustín and Carmen, my wife, Mary Carmen, my children, Salvador and Gonzalo.

Salvador Pérez Litrán

To my parents, Jaime and Clara, to my wife, Claudia, and my daughter, Emily, for the time “borrowed.”

Jaime Prieto Thomas

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