My heartfelt thanks to the panel of evaluators[1] who participated in this study: to all, my profound and sincere thanks. Without them, this work would not have been possible.

I must also name the people who, despite not directly assessing articles, played an important role in the completiont of this study: António Serrano, Álvaro Pinto, Carrilho Ramos, Christopher Bochmann, João Ilhéu, Maria Raquel Lucas and Tânia Ganho. Last but not least, I would like to thank my advisor Paulo Resende da Silva; and my wife, Alexandra Cheira, for her support and help in the text revision.

[1] Name size is proportional to the number of articles graded.