Published on in Vol 9, No 6 (2021): June
                                    Preprints (earlier versions) of this paper are
                                    available at
                                    https://preprints.jmir.org/preprint/25124, first published
                                    .
                                

1 MEDCIDS-FMUP – Community Medicine, Information and Decision Sciences, Faculty of Medicine of the University of Porto, Porto, Portugal
2 CINTESIS – Center for Health Technology and Services Research, Porto, Portugal
