Funding for this research was provided by:
H2020 Marie Skłodowska-Curie Actions (676265)
Received: 2 November 2019
Accepted: 14 October 2020
First Online: 22 October 2020
Ethics approval and consent to participate
: Not applicable.
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: We declare the following interests: Angie A. Diaz-Baquero (AADB) is a paid member of the INTRAS Foundation responsible for the development and distribution of the GRADIOR software. Manuel A. Franco-Martín (MAFM) was the initial designer of GRADIOR. Yolanda Bueno-Aguado (YBA), María T. Cid-Bartolomé (MTCB) and Esther Parra Vidales (EPV) are former members of the INTRAS Foundation. María V. Perea Bartolomé (MVPB), Isabel de la Torre Díez (ITD) and Henriëtte van der Roest (HVDR) have not interests to declare.