All authors had access to the data and a role in writing this manuscript.

Ignacio Ruiz-García is the recipient of a Río Hortega grant CM20/00225 from the Institute de Salud Carlos III and co-funded by Fondo Social Europeo 2014–2020. Laura Saso-Jimenez is the recipient of a predoctoral grant from the Education Department of the Basque Government PRE_2020_1_0282). This work was partially supported by a grant from the Department of Health of the Basque Country Government (2019111064).

The authors have no conflicts of interest to declare for this work.

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